Updated 4 existing advisories - mail, nokogiri#1235

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Updated 4 existing advisories - mail, nokogiri #1235

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11 changes: 8 additions & 3 deletions gems/mail/GHSA-mvxr-6m87-mv2q.yml
View file
Open in desktop
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,6 @@
---
gem: mail
cve: 2026-63435
ghsa: mvxr-6m87-mv2q
url: https://github.com/mikel/mail/security/advisories/GHSA-mvxr-6m87-mv2q
title: Email address spoofing via malformed RFC 2047 encoded-words in mail
Expand All@@ -14,15 +15,19 @@ description: |
part could cause the decoded output to differ from what a human
reviewer or downstream parser would expect, allowing an attacker
to spoof the apparent sender/recipient address.
cvss_v3: 5.1
cvss_v3: 5.3
patched_versions:
- ">= 2.9.1"
related:
url:
- https://nvd.nist.gov/vuln/detail/cve-2026-63435
- https://rubygems.org/gems/mail/versions/2.9.1
- https://github.com/mikel/mail/releases/tag/2.9.1
- https://github.com/mikel/mail/pull/1664
- https://github.com/mikel/mail/commit/f9d59c2e447af42e2c3dec5a56b1bb25c7292859
- https://osv.dev/vulnerability/GHSA-mvxr-6m87-mv2q
- https://advisories.gitlab.com/gem/mail/CVE-2026-63435
- https://github.com/mikel/mail/security/advisories/GHSA-mvxr-6m87-mv2q
- https://github.com/advisories/GHSA-mvxr-6m87-mv2q
notes: |
- cvss_v3, date from repo GHSA
- No CVE value.
- cvss_v3 from GHSA and nvd.nist.gov URLs.
42 changes: 17 additions & 25 deletions gems/nokogiri/GHSA-c4rq-3m3g-8wgx.yml
View file
Open in desktop
Original file line numberDiff line numberDiff line change
@@ -1,49 +1,41 @@
---
gem: nokogiri
cve: 2026-79770
ghsa: c4rq-3m3g-8wgx
url: https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-c4rq-3m3g-8wgx
title: Nokogiri CSS selector tokenizer has regular expression backtracking
date: 2026-05-06
description: |
## Summary

Nokogiri's CSS selector tokenizer contains regular expressions whose construction may result in exponential regex backtracking on adversarial selectors. Three ReDoS vectors are addressed in this release:
Nokogiri's CSS selector tokenizer contains regular expressions whose
construction may result in exponential regex backtracking on adversarial
selectors. Three ReDoS vectors are addressed in this release:

1. String-literal tokenization on certain unterminated quoted-string input.
2. String-literal tokenization on a separate class of hex-escape-rich input.
3. Identifier tokenization on hex-escape-rich input.

The public CSS selector methods that funnel through the affected tokenizer are `Nokogiri::CSS.xpath_for`, `Node#css`, `Node#at_css`, `Searchable#search`, and `CSS::Parser#parse`.


## Mitigation

Upgrade to Nokogiri `>= 1.19.3`.

If users are unable to upgrade, two options are available:

- Avoid the use of attacker-controlled text in CSS selectors. Applications that only pass developer-authored selectors to Nokogiri are not directly exposed.
- Set global `Regexp.timeout` (Ruby 3.2+, JRuby 9.4+) to bound parse time.

## Severity

The Nokogiri maintainers have evaluated this as **High Severity** (CVSS 7.5, `AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`).

An attacker able to inject user-supplied text into a CSS selector parse method can cause exponential backtracking, resulting in a potential denial of service.


## Resources

- [CWE-1333: Inefficient Regular Expression Complexity](https://cwe.mitre.org/data/definitions/1333.html)

The public CSS selector methods that funnel through the affected
tokenizer are `Nokogiri::CSS.xpath_for`, `Node#css`, `Node#at_css`,
`Searchable#search`, and `CSS::Parser#parse`.

## Credit

Vector 1 was responsibly reported by @colby-swandale. Vectors 2 and 3 were discovered by @flavorjones during the response to the original report.
Vector 1 was responsibly reported by @colby-swandale. Vectors 2 and 3
were discovered by @flavorjones during the response to the original report.
cvss_v3: 7.5
cvss_v4: 8.7
patched_versions:
- ">= 1.19.3"
related:
url:
- https://nvd.nist.gov/vuln/detail/CVE-2026-79770
- https://rubygems.org/gems/nokogiri/versions/1.19.3
- https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md#v1193--2026-04-27
- https://www.vulncheck.com/advisories/nokogiri-before-redos-via-css-selector-tokenizer
- https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-c4rq-3m3g-8wgx
- https://github.com/advisories/GHSA-c4rq-3m3g-8wgx
notes: |
- cvss_v3 from GHSA and nvd.nist.gov URLs.
- cvss_v4 from nvd.nist.gov URL.
40 changes: 15 additions & 25 deletions gems/nokogiri/GHSA-v2fc-qm4h-8hqv.yml
View file
Open in desktop
Original file line numberDiff line numberDiff line change
@@ -1,45 +1,35 @@
---
gem: nokogiri
cve: 2026-79771
ghsa: v2fc-qm4h-8hqv
url: https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-v2fc-qm4h-8hqv
url: https://nvd.nist.gov/vuln/detail/CVE-2026-79771
title: Nokogiri XSLT transform has a memory leak
date: 2026-05-06
description: |
## Summary

Nokogiri's `Nokogiri::XSLT::Stylesheet#transform` leaks a small heap allocation when passed a Ruby string parameter containing a null byte.

For applications that pass attacker-controlled input through `XSLT.transform` parameters, this may be a vector for a denial of service attack against long-running processes.


## Mitigation

Upgrade to Nokogiri `>= 1.19.3`.

Users may also be able to mitigate this issue without upgrading by validating untrusted transform parameters before passing them to `Nokogiri::XSLT::Stylesheet#transform`.


## Severity

The Nokogiri maintainers have evaluated this as **Moderate Severity**, CVSS 5.3.

Each leaked allocation is approximately 24–32 bytes, so meaningful memory growth requires sustained attacker-controlled traffic at high call rates. The bug does not cause memory corruption, information disclosure, or any change in the behavior of the transform itself, and the string-handling exception is raised as expected.

Applications that do not pass raw attacker-controlled bytes to XSLT parameters are unlikely to be affected in practice.


## Resources

- [CWE-401: Missing Release of Memory after Effective Lifetime](https://cwe.mitre.org/data/definitions/401.html)
Nokogiri's `Nokogiri::XSLT::Stylesheet#transform` leaks a small heap
allocation when passed a Ruby string parameter containing a null byte.

For applications that pass attacker-controlled input through
`XSLT.transform` parameters, this may be a vector for a denial
of service attack against long-running processes.

## Credit

This vulnerability was responsibly reported by @Captainjack-kor.
cvss_v3: 5.3
cvss_v4: 6.9
patched_versions:
- ">= 1.19.3"
related:
url:
- https://nvd.nist.gov/vuln/detail/CVE-2026-79771
- https://rubygems.org/gems/nokogiri/versions/1.19.3
- https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md#v1193--2026-04-27
- https://www.vulncheck.com/advisories/nokogiri-before-memory-leak-via-xslt-transform
- https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-v2fc-qm4h-8hqv
- https://github.com/advisories/GHSA-v2fc-qm4h-8hqv
notes: |
- cvss_v3 from GHSA and nvd.nist.gov URLs.
- cvss_v4 from nvd.nist.gov URL.
31 changes: 13 additions & 18 deletions gems/nokogiri/GHSA-wx95-c6cv-8532.yml
View file
Open in desktop
Original file line numberDiff line numberDiff line change
@@ -1,7 +1,8 @@
---
gem: nokogiri
cve: 2026-79772
ghsa: wx95-c6cv-8532
url: https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wx95-c6cv-8532
url: https://nvd.nist.gov/vuln/detail/CVE-2026-79772
title: Nokogiri does not check the return value from xmlC14NExecute
date: 2026-02-18
description: |
Expand All@@ -15,32 +16,26 @@ description: |
invalid or incomplete canonicalized XML, which has been demonstrated
to enable signature validation bypass in SAML libraries.

JRuby is not affected, as the Java implementation correctly
raises `RuntimeError` on canonicalization failure.

## Mitigation

Upgrade to Nokogiri `>= 1.19.1`.

## Severity

The maintainers have assessed this as **Medium** severity. Nokogiri
itself is a parsing library without a clear security boundary
related to canonicalization, so the direct impact is that a method
returns incorrect data on invalid input. However, this behavior
was exploited in practice to bypass SAML signature validation
in downstream libraries (see References).
JRuby is not affected, as the Java implementation correctly raises
`RuntimeError` on canonicalization failure.

## Credit

This vulnerability was responsibly reported by HackerOne
researcher `d4d`.
This vulnerability was responsibly reported by HackerOne researcher `d4d`.
cvss_v3: 5.3
cvss_v4: 6.9
unaffected_versions:
- "< 1.5.1"
patched_versions:
- ">= 1.19.1"
related:
url:
- https://nvd.nist.gov/vuln/detail/CVE-2026-79772
- https://rubygems.org/gems/nokogiri/versions/1.19.1
- https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md#v1191--2026-02-16
- https://www.vulncheck.com/advisories/nokogiri-before-unchecked-return-value-canonicalize
- https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wx95-c6cv-8532
- https://github.com/advisories/GHSA-wx95-c6cv-8532
notes: |
- cvss_v3 from GHSA and nvd.nist.gov URLs.
- cvss_v4 from nvd.nist.gov URL.
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
Updated 4 existing advisories - mail, nokogiri#1235

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Updated 4 existing advisories - mail, nokogiri
#1235
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11 changes: 8 additions & 3 deletions
gems/mail/GHSA-mvxr-6m87-mv2q.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,5 +1,6 @@
---
gem: mail
cve: 2026-63435
ghsa: mvxr-6m87-mv2q
url: https://github.com/mikel/mail/security/advisories/GHSA-mvxr-6m87-mv2q
title: Email address spoofing via malformed RFC 2047 encoded-words in mail
Expand All@@ -14,15 +15,19 @@ description: |
 part could cause the decoded output to differ from what a human
 reviewer or downstream parser would expect, allowing an attacker
 to spoof the apparent sender/recipient address.
cvss_v3: 5.1
cvss_v3: 5.3
patched_versions:
 - ">= 2.9.1"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/cve-2026-63435
 - https://rubygems.org/gems/mail/versions/2.9.1
 - https://github.com/mikel/mail/releases/tag/2.9.1
 - https://github.com/mikel/mail/pull/1664
 - https://github.com/mikel/mail/commit/f9d59c2e447af42e2c3dec5a56b1bb25c7292859
 - https://osv.dev/vulnerability/GHSA-mvxr-6m87-mv2q
 - https://advisories.gitlab.com/gem/mail/CVE-2026-63435
 - https://github.com/mikel/mail/security/advisories/GHSA-mvxr-6m87-mv2q
 - https://github.com/advisories/GHSA-mvxr-6m87-mv2q
notes: |
 - cvss_v3, date from repo GHSA
 - No CVE value.
 - cvss_v3 from GHSA and nvd.nist.gov URLs.

42 changes: 17 additions & 25 deletions
gems/nokogiri/GHSA-c4rq-3m3g-8wgx.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,49 +1,41 @@
---
gem: nokogiri
cve: 2026-79770
ghsa: c4rq-3m3g-8wgx
url: https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-c4rq-3m3g-8wgx
title: Nokogiri CSS selector tokenizer has regular expression backtracking
date: 2026-05-06
description: |
 ## Summary

 Nokogiri's CSS selector tokenizer contains regular expressions whose construction may result in exponential regex backtracking on adversarial selectors. Three ReDoS vectors are addressed in this release:
 Nokogiri's CSS selector tokenizer contains regular expressions whose
 construction may result in exponential regex backtracking on adversarial
 selectors. Three ReDoS vectors are addressed in this release:

 1. String-literal tokenization on certain unterminated quoted-string input.
 2. String-literal tokenization on a separate class of hex-escape-rich input.
 3. Identifier tokenization on hex-escape-rich input.

 The public CSS selector methods that funnel through the affected tokenizer are `Nokogiri::CSS.xpath_for`, `Node#css`, `Node#at_css`, `Searchable#search`, and `CSS::Parser#parse`.


 ## Mitigation

 Upgrade to Nokogiri `>= 1.19.3`.

 If users are unable to upgrade, two options are available:

 - Avoid the use of attacker-controlled text in CSS selectors. Applications that only pass developer-authored selectors to Nokogiri are not directly exposed.
 - Set global `Regexp.timeout` (Ruby 3.2+, JRuby 9.4+) to bound parse time.

 ## Severity

 The Nokogiri maintainers have evaluated this as **High Severity** (CVSS 7.5, `AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`).

 An attacker able to inject user-supplied text into a CSS selector parse method can cause exponential backtracking, resulting in a potential denial of service.


 ## Resources

 - [CWE-1333: Inefficient Regular Expression Complexity](https://cwe.mitre.org/data/definitions/1333.html)

 The public CSS selector methods that funnel through the affected
 tokenizer are `Nokogiri::CSS.xpath_for`, `Node#css`, `Node#at_css`,
 `Searchable#search`, and `CSS::Parser#parse`.

 ## Credit

 Vector 1 was responsibly reported by @colby-swandale. Vectors 2 and 3 were discovered by @flavorjones during the response to the original report.
 Vector 1 was responsibly reported by @colby-swandale. Vectors 2 and 3
 were discovered by @flavorjones during the response to the original report.
cvss_v3: 7.5
cvss_v4: 8.7
patched_versions:
 - ">= 1.19.3"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-79770
 - https://rubygems.org/gems/nokogiri/versions/1.19.3
 - https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md#v1193--2026-04-27
 - https://www.vulncheck.com/advisories/nokogiri-before-redos-via-css-selector-tokenizer
 - https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-c4rq-3m3g-8wgx
 - https://github.com/advisories/GHSA-c4rq-3m3g-8wgx
notes: |
 - cvss_v3 from GHSA and nvd.nist.gov URLs.
 - cvss_v4 from nvd.nist.gov URL.

40 changes: 15 additions & 25 deletions
gems/nokogiri/GHSA-v2fc-qm4h-8hqv.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,45 +1,35 @@
---
gem: nokogiri
cve: 2026-79771
ghsa: v2fc-qm4h-8hqv
url: https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-v2fc-qm4h-8hqv
url: https://nvd.nist.gov/vuln/detail/CVE-2026-79771
title: Nokogiri XSLT transform has a memory leak
date: 2026-05-06
description: |
 ## Summary

 Nokogiri's `Nokogiri::XSLT::Stylesheet#transform` leaks a small heap allocation when passed a Ruby string parameter containing a null byte.

 For applications that pass attacker-controlled input through `XSLT.transform` parameters, this may be a vector for a denial of service attack against long-running processes.


 ## Mitigation

 Upgrade to Nokogiri `>= 1.19.3`.

 Users may also be able to mitigate this issue without upgrading by validating untrusted transform parameters before passing them to `Nokogiri::XSLT::Stylesheet#transform`.


 ## Severity

 The Nokogiri maintainers have evaluated this as **Moderate Severity**, CVSS 5.3.

 Each leaked allocation is approximately 24–32 bytes, so meaningful memory growth requires sustained attacker-controlled traffic at high call rates. The bug does not cause memory corruption, information disclosure, or any change in the behavior of the transform itself, and the string-handling exception is raised as expected.

 Applications that do not pass raw attacker-controlled bytes to XSLT parameters are unlikely to be affected in practice.


 ## Resources

 - [CWE-401: Missing Release of Memory after Effective Lifetime](https://cwe.mitre.org/data/definitions/401.html)
 Nokogiri's `Nokogiri::XSLT::Stylesheet#transform` leaks a small heap
 allocation when passed a Ruby string parameter containing a null byte.

 For applications that pass attacker-controlled input through
 `XSLT.transform` parameters, this may be a vector for a denial
 of service attack against long-running processes.

 ## Credit

 This vulnerability was responsibly reported by @Captainjack-kor.
cvss_v3: 5.3
cvss_v4: 6.9
patched_versions:
 - ">= 1.19.3"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-79771
 - https://rubygems.org/gems/nokogiri/versions/1.19.3
 - https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md#v1193--2026-04-27
 - https://www.vulncheck.com/advisories/nokogiri-before-memory-leak-via-xslt-transform
 - https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-v2fc-qm4h-8hqv
 - https://github.com/advisories/GHSA-v2fc-qm4h-8hqv
notes: |
 - cvss_v3 from GHSA and nvd.nist.gov URLs.
 - cvss_v4 from nvd.nist.gov URL.

31 changes: 13 additions & 18 deletions
gems/nokogiri/GHSA-wx95-c6cv-8532.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,7 +1,8 @@
---
gem: nokogiri
cve: 2026-79772
ghsa: wx95-c6cv-8532
url: https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wx95-c6cv-8532
url: https://nvd.nist.gov/vuln/detail/CVE-2026-79772
title: Nokogiri does not check the return value from xmlC14NExecute
date: 2026-02-18
description: |
Expand All@@ -15,32 +16,26 @@ description: |
 invalid or incomplete canonicalized XML, which has been demonstrated
 to enable signature validation bypass in SAML libraries.

 JRuby is not affected, as the Java implementation correctly
 raises `RuntimeError` on canonicalization failure.

 ## Mitigation

 Upgrade to Nokogiri `>= 1.19.1`.

 ## Severity

 The maintainers have assessed this as **Medium** severity. Nokogiri
 itself is a parsing library without a clear security boundary
 related to canonicalization, so the direct impact is that a method
 returns incorrect data on invalid input. However, this behavior
 was exploited in practice to bypass SAML signature validation
 in downstream libraries (see References).
 JRuby is not affected, as the Java implementation correctly raises
 `RuntimeError` on canonicalization failure.

 ## Credit

 This vulnerability was responsibly reported by HackerOne
 researcher `d4d`.
 This vulnerability was responsibly reported by HackerOne researcher `d4d`.
cvss_v3: 5.3
cvss_v4: 6.9
unaffected_versions:
 - "< 1.5.1"
patched_versions:
 - ">= 1.19.1"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-79772
 - https://rubygems.org/gems/nokogiri/versions/1.19.1
 - https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md#v1191--2026-02-16
 - https://www.vulncheck.com/advisories/nokogiri-before-unchecked-return-value-canonicalize
 - https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wx95-c6cv-8532
 - https://github.com/advisories/GHSA-wx95-c6cv-8532
notes: |
 - cvss_v3 from GHSA and nvd.nist.gov URLs.
 - cvss_v4 from nvd.nist.gov URL.

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Updated 4 existing advisories - mail, nokogiri#1235

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

 Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and
privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
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 Open

jasnow
wants to merge
1
commit into

base:master
Choose a base branch

from


+53

−71

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Updated 4 existing advisories - mail, nokogiri
#1235
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11 changes: 8 additions & 3 deletions
gems/mail/GHSA-mvxr-6m87-mv2q.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,5 +1,6 @@
---
gem: mail
cve: 2026-63435
ghsa: mvxr-6m87-mv2q
url: https://github.com/mikel/mail/security/advisories/GHSA-mvxr-6m87-mv2q
title: Email address spoofing via malformed RFC 2047 encoded-words in mail
Expand All@@ -14,15 +15,19 @@ description: |
 part could cause the decoded output to differ from what a human
 reviewer or downstream parser would expect, allowing an attacker
 to spoof the apparent sender/recipient address.
cvss_v3: 5.1
cvss_v3: 5.3
patched_versions:
 - ">= 2.9.1"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/cve-2026-63435
 - https://rubygems.org/gems/mail/versions/2.9.1
 - https://github.com/mikel/mail/releases/tag/2.9.1
 - https://github.com/mikel/mail/pull/1664
 - https://github.com/mikel/mail/commit/f9d59c2e447af42e2c3dec5a56b1bb25c7292859
 - https://osv.dev/vulnerability/GHSA-mvxr-6m87-mv2q
 - https://advisories.gitlab.com/gem/mail/CVE-2026-63435
 - https://github.com/mikel/mail/security/advisories/GHSA-mvxr-6m87-mv2q
 - https://github.com/advisories/GHSA-mvxr-6m87-mv2q
notes: |
 - cvss_v3, date from repo GHSA
 - No CVE value.
 - cvss_v3 from GHSA and nvd.nist.gov URLs.

42 changes: 17 additions & 25 deletions
gems/nokogiri/GHSA-c4rq-3m3g-8wgx.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,49 +1,41 @@
---
gem: nokogiri
cve: 2026-79770
ghsa: c4rq-3m3g-8wgx
url: https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-c4rq-3m3g-8wgx
title: Nokogiri CSS selector tokenizer has regular expression backtracking
date: 2026-05-06
description: |
 ## Summary

 Nokogiri's CSS selector tokenizer contains regular expressions whose construction may result in exponential regex backtracking on adversarial selectors. Three ReDoS vectors are addressed in this release:
 Nokogiri's CSS selector tokenizer contains regular expressions whose
 construction may result in exponential regex backtracking on adversarial
 selectors. Three ReDoS vectors are addressed in this release:

 1. String-literal tokenization on certain unterminated quoted-string input.
 2. String-literal tokenization on a separate class of hex-escape-rich input.
 3. Identifier tokenization on hex-escape-rich input.

 The public CSS selector methods that funnel through the affected tokenizer are `Nokogiri::CSS.xpath_for`, `Node#css`, `Node#at_css`, `Searchable#search`, and `CSS::Parser#parse`.


 ## Mitigation

 Upgrade to Nokogiri `>= 1.19.3`.

 If users are unable to upgrade, two options are available:

 - Avoid the use of attacker-controlled text in CSS selectors. Applications that only pass developer-authored selectors to Nokogiri are not directly exposed.
 - Set global `Regexp.timeout` (Ruby 3.2+, JRuby 9.4+) to bound parse time.

 ## Severity

 The Nokogiri maintainers have evaluated this as **High Severity** (CVSS 7.5, `AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`).

 An attacker able to inject user-supplied text into a CSS selector parse method can cause exponential backtracking, resulting in a potential denial of service.


 ## Resources

 - [CWE-1333: Inefficient Regular Expression Complexity](https://cwe.mitre.org/data/definitions/1333.html)

 The public CSS selector methods that funnel through the affected
 tokenizer are `Nokogiri::CSS.xpath_for`, `Node#css`, `Node#at_css`,
 `Searchable#search`, and `CSS::Parser#parse`.

 ## Credit

 Vector 1 was responsibly reported by @colby-swandale. Vectors 2 and 3 were discovered by @flavorjones during the response to the original report.
 Vector 1 was responsibly reported by @colby-swandale. Vectors 2 and 3
 were discovered by @flavorjones during the response to the original report.
cvss_v3: 7.5
cvss_v4: 8.7
patched_versions:
 - ">= 1.19.3"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-79770
 - https://rubygems.org/gems/nokogiri/versions/1.19.3
 - https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md#v1193--2026-04-27
 - https://www.vulncheck.com/advisories/nokogiri-before-redos-via-css-selector-tokenizer
 - https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-c4rq-3m3g-8wgx
 - https://github.com/advisories/GHSA-c4rq-3m3g-8wgx
notes: |
 - cvss_v3 from GHSA and nvd.nist.gov URLs.
 - cvss_v4 from nvd.nist.gov URL.

40 changes: 15 additions & 25 deletions
gems/nokogiri/GHSA-v2fc-qm4h-8hqv.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,45 +1,35 @@
---
gem: nokogiri
cve: 2026-79771
ghsa: v2fc-qm4h-8hqv
url: https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-v2fc-qm4h-8hqv
url: https://nvd.nist.gov/vuln/detail/CVE-2026-79771
title: Nokogiri XSLT transform has a memory leak
date: 2026-05-06
description: |
 ## Summary

 Nokogiri's `Nokogiri::XSLT::Stylesheet#transform` leaks a small heap allocation when passed a Ruby string parameter containing a null byte.

 For applications that pass attacker-controlled input through `XSLT.transform` parameters, this may be a vector for a denial of service attack against long-running processes.


 ## Mitigation

 Upgrade to Nokogiri `>= 1.19.3`.

 Users may also be able to mitigate this issue without upgrading by validating untrusted transform parameters before passing them to `Nokogiri::XSLT::Stylesheet#transform`.


 ## Severity

 The Nokogiri maintainers have evaluated this as **Moderate Severity**, CVSS 5.3.

 Each leaked allocation is approximately 24–32 bytes, so meaningful memory growth requires sustained attacker-controlled traffic at high call rates. The bug does not cause memory corruption, information disclosure, or any change in the behavior of the transform itself, and the string-handling exception is raised as expected.

 Applications that do not pass raw attacker-controlled bytes to XSLT parameters are unlikely to be affected in practice.


 ## Resources

 - [CWE-401: Missing Release of Memory after Effective Lifetime](https://cwe.mitre.org/data/definitions/401.html)
 Nokogiri's `Nokogiri::XSLT::Stylesheet#transform` leaks a small heap
 allocation when passed a Ruby string parameter containing a null byte.

 For applications that pass attacker-controlled input through
 `XSLT.transform` parameters, this may be a vector for a denial
 of service attack against long-running processes.

 ## Credit

 This vulnerability was responsibly reported by @Captainjack-kor.
cvss_v3: 5.3
cvss_v4: 6.9
patched_versions:
 - ">= 1.19.3"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-79771
 - https://rubygems.org/gems/nokogiri/versions/1.19.3
 - https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md#v1193--2026-04-27
 - https://www.vulncheck.com/advisories/nokogiri-before-memory-leak-via-xslt-transform
 - https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-v2fc-qm4h-8hqv
 - https://github.com/advisories/GHSA-v2fc-qm4h-8hqv
notes: |
 - cvss_v3 from GHSA and nvd.nist.gov URLs.
 - cvss_v4 from nvd.nist.gov URL.

31 changes: 13 additions & 18 deletions
gems/nokogiri/GHSA-wx95-c6cv-8532.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,7 +1,8 @@
---
gem: nokogiri
cve: 2026-79772
ghsa: wx95-c6cv-8532
url: https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wx95-c6cv-8532
url: https://nvd.nist.gov/vuln/detail/CVE-2026-79772
title: Nokogiri does not check the return value from xmlC14NExecute
date: 2026-02-18
description: |
Expand All@@ -15,32 +16,26 @@ description: |
 invalid or incomplete canonicalized XML, which has been demonstrated
 to enable signature validation bypass in SAML libraries.

 JRuby is not affected, as the Java implementation correctly
 raises `RuntimeError` on canonicalization failure.

 ## Mitigation

 Upgrade to Nokogiri `>= 1.19.1`.

 ## Severity

 The maintainers have assessed this as **Medium** severity. Nokogiri
 itself is a parsing library without a clear security boundary
 related to canonicalization, so the direct impact is that a method
 returns incorrect data on invalid input. However, this behavior
 was exploited in practice to bypass SAML signature validation
 in downstream libraries (see References).
 JRuby is not affected, as the Java implementation correctly raises
 `RuntimeError` on canonicalization failure.

 ## Credit

 This vulnerability was responsibly reported by HackerOne
 researcher `d4d`.
 This vulnerability was responsibly reported by HackerOne researcher `d4d`.
cvss_v3: 5.3
cvss_v4: 6.9
unaffected_versions:
 - "< 1.5.1"
patched_versions:
 - ">= 1.19.1"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-79772
 - https://rubygems.org/gems/nokogiri/versions/1.19.1
 - https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md#v1191--2026-02-16
 - https://www.vulncheck.com/advisories/nokogiri-before-unchecked-return-value-canonicalize
 - https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wx95-c6cv-8532
 - https://github.com/advisories/GHSA-wx95-c6cv-8532
notes: |
 - cvss_v3 from GHSA and nvd.nist.gov URLs.
 - cvss_v4 from nvd.nist.gov URL.

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Updated 4 existing advisories - mail, nokogiri#1235

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Updated 4 existing advisories - mail, nokogiri
#1235
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11 changes: 8 additions & 3 deletions
gems/mail/GHSA-mvxr-6m87-mv2q.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,5 +1,6 @@
---
gem: mail
cve: 2026-63435
ghsa: mvxr-6m87-mv2q
url: https://github.com/mikel/mail/security/advisories/GHSA-mvxr-6m87-mv2q
title: Email address spoofing via malformed RFC 2047 encoded-words in mail
Expand All@@ -14,15 +15,19 @@ description: |
 part could cause the decoded output to differ from what a human
 reviewer or downstream parser would expect, allowing an attacker
 to spoof the apparent sender/recipient address.
cvss_v3: 5.1
cvss_v3: 5.3
patched_versions:
 - ">= 2.9.1"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/cve-2026-63435
 - https://rubygems.org/gems/mail/versions/2.9.1
 - https://github.com/mikel/mail/releases/tag/2.9.1
 - https://github.com/mikel/mail/pull/1664
 - https://github.com/mikel/mail/commit/f9d59c2e447af42e2c3dec5a56b1bb25c7292859
 - https://osv.dev/vulnerability/GHSA-mvxr-6m87-mv2q
 - https://advisories.gitlab.com/gem/mail/CVE-2026-63435
 - https://github.com/mikel/mail/security/advisories/GHSA-mvxr-6m87-mv2q
 - https://github.com/advisories/GHSA-mvxr-6m87-mv2q
notes: |
 - cvss_v3, date from repo GHSA
 - No CVE value.
 - cvss_v3 from GHSA and nvd.nist.gov URLs.

42 changes: 17 additions & 25 deletions
gems/nokogiri/GHSA-c4rq-3m3g-8wgx.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,49 +1,41 @@
---
gem: nokogiri
cve: 2026-79770
ghsa: c4rq-3m3g-8wgx
url: https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-c4rq-3m3g-8wgx
title: Nokogiri CSS selector tokenizer has regular expression backtracking
date: 2026-05-06
description: |
 ## Summary

 Nokogiri's CSS selector tokenizer contains regular expressions whose construction may result in exponential regex backtracking on adversarial selectors. Three ReDoS vectors are addressed in this release:
 Nokogiri's CSS selector tokenizer contains regular expressions whose
 construction may result in exponential regex backtracking on adversarial
 selectors. Three ReDoS vectors are addressed in this release:

 1. String-literal tokenization on certain unterminated quoted-string input.
 2. String-literal tokenization on a separate class of hex-escape-rich input.
 3. Identifier tokenization on hex-escape-rich input.

 The public CSS selector methods that funnel through the affected tokenizer are `Nokogiri::CSS.xpath_for`, `Node#css`, `Node#at_css`, `Searchable#search`, and `CSS::Parser#parse`.


 ## Mitigation

 Upgrade to Nokogiri `>= 1.19.3`.

 If users are unable to upgrade, two options are available:

 - Avoid the use of attacker-controlled text in CSS selectors. Applications that only pass developer-authored selectors to Nokogiri are not directly exposed.
 - Set global `Regexp.timeout` (Ruby 3.2+, JRuby 9.4+) to bound parse time.

 ## Severity

 The Nokogiri maintainers have evaluated this as **High Severity** (CVSS 7.5, `AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`).

 An attacker able to inject user-supplied text into a CSS selector parse method can cause exponential backtracking, resulting in a potential denial of service.


 ## Resources

 - [CWE-1333: Inefficient Regular Expression Complexity](https://cwe.mitre.org/data/definitions/1333.html)

 The public CSS selector methods that funnel through the affected
 tokenizer are `Nokogiri::CSS.xpath_for`, `Node#css`, `Node#at_css`,
 `Searchable#search`, and `CSS::Parser#parse`.

 ## Credit

 Vector 1 was responsibly reported by @colby-swandale. Vectors 2 and 3 were discovered by @flavorjones during the response to the original report.
 Vector 1 was responsibly reported by @colby-swandale. Vectors 2 and 3
 were discovered by @flavorjones during the response to the original report.
cvss_v3: 7.5
cvss_v4: 8.7
patched_versions:
 - ">= 1.19.3"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-79770
 - https://rubygems.org/gems/nokogiri/versions/1.19.3
 - https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md#v1193--2026-04-27
 - https://www.vulncheck.com/advisories/nokogiri-before-redos-via-css-selector-tokenizer
 - https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-c4rq-3m3g-8wgx
 - https://github.com/advisories/GHSA-c4rq-3m3g-8wgx
notes: |
 - cvss_v3 from GHSA and nvd.nist.gov URLs.
 - cvss_v4 from nvd.nist.gov URL.

40 changes: 15 additions & 25 deletions
gems/nokogiri/GHSA-v2fc-qm4h-8hqv.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,45 +1,35 @@
---
gem: nokogiri
cve: 2026-79771
ghsa: v2fc-qm4h-8hqv
url: https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-v2fc-qm4h-8hqv
url: https://nvd.nist.gov/vuln/detail/CVE-2026-79771
title: Nokogiri XSLT transform has a memory leak
date: 2026-05-06
description: |
 ## Summary

 Nokogiri's `Nokogiri::XSLT::Stylesheet#transform` leaks a small heap allocation when passed a Ruby string parameter containing a null byte.

 For applications that pass attacker-controlled input through `XSLT.transform` parameters, this may be a vector for a denial of service attack against long-running processes.


 ## Mitigation

 Upgrade to Nokogiri `>= 1.19.3`.

 Users may also be able to mitigate this issue without upgrading by validating untrusted transform parameters before passing them to `Nokogiri::XSLT::Stylesheet#transform`.


 ## Severity

 The Nokogiri maintainers have evaluated this as **Moderate Severity**, CVSS 5.3.

 Each leaked allocation is approximately 24–32 bytes, so meaningful memory growth requires sustained attacker-controlled traffic at high call rates. The bug does not cause memory corruption, information disclosure, or any change in the behavior of the transform itself, and the string-handling exception is raised as expected.

 Applications that do not pass raw attacker-controlled bytes to XSLT parameters are unlikely to be affected in practice.


 ## Resources

 - [CWE-401: Missing Release of Memory after Effective Lifetime](https://cwe.mitre.org/data/definitions/401.html)
 Nokogiri's `Nokogiri::XSLT::Stylesheet#transform` leaks a small heap
 allocation when passed a Ruby string parameter containing a null byte.

 For applications that pass attacker-controlled input through
 `XSLT.transform` parameters, this may be a vector for a denial
 of service attack against long-running processes.

 ## Credit

 This vulnerability was responsibly reported by @Captainjack-kor.
cvss_v3: 5.3
cvss_v4: 6.9
patched_versions:
 - ">= 1.19.3"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-79771
 - https://rubygems.org/gems/nokogiri/versions/1.19.3
 - https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md#v1193--2026-04-27
 - https://www.vulncheck.com/advisories/nokogiri-before-memory-leak-via-xslt-transform
 - https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-v2fc-qm4h-8hqv
 - https://github.com/advisories/GHSA-v2fc-qm4h-8hqv
notes: |
 - cvss_v3 from GHSA and nvd.nist.gov URLs.
 - cvss_v4 from nvd.nist.gov URL.

31 changes: 13 additions & 18 deletions
gems/nokogiri/GHSA-wx95-c6cv-8532.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,7 +1,8 @@
---
gem: nokogiri
cve: 2026-79772
ghsa: wx95-c6cv-8532
url: https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wx95-c6cv-8532
url: https://nvd.nist.gov/vuln/detail/CVE-2026-79772
title: Nokogiri does not check the return value from xmlC14NExecute
date: 2026-02-18
description: |
Expand All@@ -15,32 +16,26 @@ description: |
 invalid or incomplete canonicalized XML, which has been demonstrated
 to enable signature validation bypass in SAML libraries.

 JRuby is not affected, as the Java implementation correctly
 raises `RuntimeError` on canonicalization failure.

 ## Mitigation

 Upgrade to Nokogiri `>= 1.19.1`.

 ## Severity

 The maintainers have assessed this as **Medium** severity. Nokogiri
 itself is a parsing library without a clear security boundary
 related to canonicalization, so the direct impact is that a method
 returns incorrect data on invalid input. However, this behavior
 was exploited in practice to bypass SAML signature validation
 in downstream libraries (see References).
 JRuby is not affected, as the Java implementation correctly raises
 `RuntimeError` on canonicalization failure.

 ## Credit

 This vulnerability was responsibly reported by HackerOne
 researcher `d4d`.
 This vulnerability was responsibly reported by HackerOne researcher `d4d`.
cvss_v3: 5.3
cvss_v4: 6.9
unaffected_versions:
 - "< 1.5.1"
patched_versions:
 - ">= 1.19.1"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-79772
 - https://rubygems.org/gems/nokogiri/versions/1.19.1
 - https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md#v1191--2026-02-16
 - https://www.vulncheck.com/advisories/nokogiri-before-unchecked-return-value-canonicalize
 - https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wx95-c6cv-8532
 - https://github.com/advisories/GHSA-wx95-c6cv-8532
notes: |
 - cvss_v3 from GHSA and nvd.nist.gov URLs.
 - cvss_v4 from nvd.nist.gov URL.

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
Updated 4 existing advisories - mail, nokogiri#1235

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

 Sign up for GitHub

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privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Open

jasnow
wants to merge
1
commit into

base:master
Choose a base branch

from


+53

−71

 Open


Updated 4 existing advisories - mail, nokogiri
#1235
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11 changes: 8 additions & 3 deletions
gems/mail/GHSA-mvxr-6m87-mv2q.yml

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Original file line numberDiff line numberDiff line change
@@ -1,5 +1,6 @@
---
gem: mail
cve: 2026-63435
ghsa: mvxr-6m87-mv2q
url: https://github.com/mikel/mail/security/advisories/GHSA-mvxr-6m87-mv2q
title: Email address spoofing via malformed RFC 2047 encoded-words in mail
Expand All@@ -14,15 +15,19 @@ description: |
 part could cause the decoded output to differ from what a human
 reviewer or downstream parser would expect, allowing an attacker
 to spoof the apparent sender/recipient address.
cvss_v3: 5.1
cvss_v3: 5.3
patched_versions:
 - ">= 2.9.1"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/cve-2026-63435
 - https://rubygems.org/gems/mail/versions/2.9.1
 - https://github.com/mikel/mail/releases/tag/2.9.1
 - https://github.com/mikel/mail/pull/1664
 - https://github.com/mikel/mail/commit/f9d59c2e447af42e2c3dec5a56b1bb25c7292859
 - https://osv.dev/vulnerability/GHSA-mvxr-6m87-mv2q
 - https://advisories.gitlab.com/gem/mail/CVE-2026-63435
 - https://github.com/mikel/mail/security/advisories/GHSA-mvxr-6m87-mv2q
 - https://github.com/advisories/GHSA-mvxr-6m87-mv2q
notes: |
 - cvss_v3, date from repo GHSA
 - No CVE value.
 - cvss_v3 from GHSA and nvd.nist.gov URLs.

42 changes: 17 additions & 25 deletions
gems/nokogiri/GHSA-c4rq-3m3g-8wgx.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,49 +1,41 @@
---
gem: nokogiri
cve: 2026-79770
ghsa: c4rq-3m3g-8wgx
url: https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-c4rq-3m3g-8wgx
title: Nokogiri CSS selector tokenizer has regular expression backtracking
date: 2026-05-06
description: |
 ## Summary

 Nokogiri's CSS selector tokenizer contains regular expressions whose construction may result in exponential regex backtracking on adversarial selectors. Three ReDoS vectors are addressed in this release:
 Nokogiri's CSS selector tokenizer contains regular expressions whose
 construction may result in exponential regex backtracking on adversarial
 selectors. Three ReDoS vectors are addressed in this release:

 1. String-literal tokenization on certain unterminated quoted-string input.
 2. String-literal tokenization on a separate class of hex-escape-rich input.
 3. Identifier tokenization on hex-escape-rich input.

 The public CSS selector methods that funnel through the affected tokenizer are `Nokogiri::CSS.xpath_for`, `Node#css`, `Node#at_css`, `Searchable#search`, and `CSS::Parser#parse`.


 ## Mitigation

 Upgrade to Nokogiri `>= 1.19.3`.

 If users are unable to upgrade, two options are available:

 - Avoid the use of attacker-controlled text in CSS selectors. Applications that only pass developer-authored selectors to Nokogiri are not directly exposed.
 - Set global `Regexp.timeout` (Ruby 3.2+, JRuby 9.4+) to bound parse time.

 ## Severity

 The Nokogiri maintainers have evaluated this as **High Severity** (CVSS 7.5, `AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`).

 An attacker able to inject user-supplied text into a CSS selector parse method can cause exponential backtracking, resulting in a potential denial of service.


 ## Resources

 - [CWE-1333: Inefficient Regular Expression Complexity](https://cwe.mitre.org/data/definitions/1333.html)

 The public CSS selector methods that funnel through the affected
 tokenizer are `Nokogiri::CSS.xpath_for`, `Node#css`, `Node#at_css`,
 `Searchable#search`, and `CSS::Parser#parse`.

 ## Credit

 Vector 1 was responsibly reported by @colby-swandale. Vectors 2 and 3 were discovered by @flavorjones during the response to the original report.
 Vector 1 was responsibly reported by @colby-swandale. Vectors 2 and 3
 were discovered by @flavorjones during the response to the original report.
cvss_v3: 7.5
cvss_v4: 8.7
patched_versions:
 - ">= 1.19.3"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-79770
 - https://rubygems.org/gems/nokogiri/versions/1.19.3
 - https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md#v1193--2026-04-27
 - https://www.vulncheck.com/advisories/nokogiri-before-redos-via-css-selector-tokenizer
 - https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-c4rq-3m3g-8wgx
 - https://github.com/advisories/GHSA-c4rq-3m3g-8wgx
notes: |
 - cvss_v3 from GHSA and nvd.nist.gov URLs.
 - cvss_v4 from nvd.nist.gov URL.

40 changes: 15 additions & 25 deletions
gems/nokogiri/GHSA-v2fc-qm4h-8hqv.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,45 +1,35 @@
---
gem: nokogiri
cve: 2026-79771
ghsa: v2fc-qm4h-8hqv
url: https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-v2fc-qm4h-8hqv
url: https://nvd.nist.gov/vuln/detail/CVE-2026-79771
title: Nokogiri XSLT transform has a memory leak
date: 2026-05-06
description: |
 ## Summary

 Nokogiri's `Nokogiri::XSLT::Stylesheet#transform` leaks a small heap allocation when passed a Ruby string parameter containing a null byte.

 For applications that pass attacker-controlled input through `XSLT.transform` parameters, this may be a vector for a denial of service attack against long-running processes.


 ## Mitigation

 Upgrade to Nokogiri `>= 1.19.3`.

 Users may also be able to mitigate this issue without upgrading by validating untrusted transform parameters before passing them to `Nokogiri::XSLT::Stylesheet#transform`.


 ## Severity

 The Nokogiri maintainers have evaluated this as **Moderate Severity**, CVSS 5.3.

 Each leaked allocation is approximately 24–32 bytes, so meaningful memory growth requires sustained attacker-controlled traffic at high call rates. The bug does not cause memory corruption, information disclosure, or any change in the behavior of the transform itself, and the string-handling exception is raised as expected.

 Applications that do not pass raw attacker-controlled bytes to XSLT parameters are unlikely to be affected in practice.


 ## Resources

 - [CWE-401: Missing Release of Memory after Effective Lifetime](https://cwe.mitre.org/data/definitions/401.html)
 Nokogiri's `Nokogiri::XSLT::Stylesheet#transform` leaks a small heap
 allocation when passed a Ruby string parameter containing a null byte.

 For applications that pass attacker-controlled input through
 `XSLT.transform` parameters, this may be a vector for a denial
 of service attack against long-running processes.

 ## Credit

 This vulnerability was responsibly reported by @Captainjack-kor.
cvss_v3: 5.3
cvss_v4: 6.9
patched_versions:
 - ">= 1.19.3"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-79771
 - https://rubygems.org/gems/nokogiri/versions/1.19.3
 - https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md#v1193--2026-04-27
 - https://www.vulncheck.com/advisories/nokogiri-before-memory-leak-via-xslt-transform
 - https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-v2fc-qm4h-8hqv
 - https://github.com/advisories/GHSA-v2fc-qm4h-8hqv
notes: |
 - cvss_v3 from GHSA and nvd.nist.gov URLs.
 - cvss_v4 from nvd.nist.gov URL.

31 changes: 13 additions & 18 deletions
gems/nokogiri/GHSA-wx95-c6cv-8532.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,7 +1,8 @@
---
gem: nokogiri
cve: 2026-79772
ghsa: wx95-c6cv-8532
url: https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wx95-c6cv-8532
url: https://nvd.nist.gov/vuln/detail/CVE-2026-79772
title: Nokogiri does not check the return value from xmlC14NExecute
date: 2026-02-18
description: |
Expand All@@ -15,32 +16,26 @@ description: |
 invalid or incomplete canonicalized XML, which has been demonstrated
 to enable signature validation bypass in SAML libraries.

 JRuby is not affected, as the Java implementation correctly
 raises `RuntimeError` on canonicalization failure.

 ## Mitigation

 Upgrade to Nokogiri `>= 1.19.1`.

 ## Severity

 The maintainers have assessed this as **Medium** severity. Nokogiri
 itself is a parsing library without a clear security boundary
 related to canonicalization, so the direct impact is that a method
 returns incorrect data on invalid input. However, this behavior
 was exploited in practice to bypass SAML signature validation
 in downstream libraries (see References).
 JRuby is not affected, as the Java implementation correctly raises
 `RuntimeError` on canonicalization failure.

 ## Credit

 This vulnerability was responsibly reported by HackerOne
 researcher `d4d`.
 This vulnerability was responsibly reported by HackerOne researcher `d4d`.
cvss_v3: 5.3
cvss_v4: 6.9
unaffected_versions:
 - "< 1.5.1"
patched_versions:
 - ">= 1.19.1"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-79772
 - https://rubygems.org/gems/nokogiri/versions/1.19.1
 - https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md#v1191--2026-02-16
 - https://www.vulncheck.com/advisories/nokogiri-before-unchecked-return-value-canonicalize
 - https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wx95-c6cv-8532
 - https://github.com/advisories/GHSA-wx95-c6cv-8532
notes: |
 - cvss_v3 from GHSA and nvd.nist.gov URLs.
 - cvss_v4 from nvd.nist.gov URL.

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Updated 4 existing advisories - mail, nokogiri#1235

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Updated 4 existing advisories - mail, nokogiri
#1235
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11 changes: 8 additions & 3 deletions
gems/mail/GHSA-mvxr-6m87-mv2q.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,5 +1,6 @@
---
gem: mail
cve: 2026-63435
ghsa: mvxr-6m87-mv2q
url: https://github.com/mikel/mail/security/advisories/GHSA-mvxr-6m87-mv2q
title: Email address spoofing via malformed RFC 2047 encoded-words in mail
Expand All@@ -14,15 +15,19 @@ description: |
 part could cause the decoded output to differ from what a human
 reviewer or downstream parser would expect, allowing an attacker
 to spoof the apparent sender/recipient address.
cvss_v3: 5.1
cvss_v3: 5.3
patched_versions:
 - ">= 2.9.1"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/cve-2026-63435
 - https://rubygems.org/gems/mail/versions/2.9.1
 - https://github.com/mikel/mail/releases/tag/2.9.1
 - https://github.com/mikel/mail/pull/1664
 - https://github.com/mikel/mail/commit/f9d59c2e447af42e2c3dec5a56b1bb25c7292859
 - https://osv.dev/vulnerability/GHSA-mvxr-6m87-mv2q
 - https://advisories.gitlab.com/gem/mail/CVE-2026-63435
 - https://github.com/mikel/mail/security/advisories/GHSA-mvxr-6m87-mv2q
 - https://github.com/advisories/GHSA-mvxr-6m87-mv2q
notes: |
 - cvss_v3, date from repo GHSA
 - No CVE value.
 - cvss_v3 from GHSA and nvd.nist.gov URLs.

42 changes: 17 additions & 25 deletions
gems/nokogiri/GHSA-c4rq-3m3g-8wgx.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,49 +1,41 @@
---
gem: nokogiri
cve: 2026-79770
ghsa: c4rq-3m3g-8wgx
url: https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-c4rq-3m3g-8wgx
title: Nokogiri CSS selector tokenizer has regular expression backtracking
date: 2026-05-06
description: |
 ## Summary

 Nokogiri's CSS selector tokenizer contains regular expressions whose construction may result in exponential regex backtracking on adversarial selectors. Three ReDoS vectors are addressed in this release:
 Nokogiri's CSS selector tokenizer contains regular expressions whose
 construction may result in exponential regex backtracking on adversarial
 selectors. Three ReDoS vectors are addressed in this release:

 1. String-literal tokenization on certain unterminated quoted-string input.
 2. String-literal tokenization on a separate class of hex-escape-rich input.
 3. Identifier tokenization on hex-escape-rich input.

 The public CSS selector methods that funnel through the affected tokenizer are `Nokogiri::CSS.xpath_for`, `Node#css`, `Node#at_css`, `Searchable#search`, and `CSS::Parser#parse`.


 ## Mitigation

 Upgrade to Nokogiri `>= 1.19.3`.

 If users are unable to upgrade, two options are available:

 - Avoid the use of attacker-controlled text in CSS selectors. Applications that only pass developer-authored selectors to Nokogiri are not directly exposed.
 - Set global `Regexp.timeout` (Ruby 3.2+, JRuby 9.4+) to bound parse time.

 ## Severity

 The Nokogiri maintainers have evaluated this as **High Severity** (CVSS 7.5, `AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`).

 An attacker able to inject user-supplied text into a CSS selector parse method can cause exponential backtracking, resulting in a potential denial of service.


 ## Resources

 - [CWE-1333: Inefficient Regular Expression Complexity](https://cwe.mitre.org/data/definitions/1333.html)

 The public CSS selector methods that funnel through the affected
 tokenizer are `Nokogiri::CSS.xpath_for`, `Node#css`, `Node#at_css`,
 `Searchable#search`, and `CSS::Parser#parse`.

 ## Credit

 Vector 1 was responsibly reported by @colby-swandale. Vectors 2 and 3 were discovered by @flavorjones during the response to the original report.
 Vector 1 was responsibly reported by @colby-swandale. Vectors 2 and 3
 were discovered by @flavorjones during the response to the original report.
cvss_v3: 7.5
cvss_v4: 8.7
patched_versions:
 - ">= 1.19.3"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-79770
 - https://rubygems.org/gems/nokogiri/versions/1.19.3
 - https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md#v1193--2026-04-27
 - https://www.vulncheck.com/advisories/nokogiri-before-redos-via-css-selector-tokenizer
 - https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-c4rq-3m3g-8wgx
 - https://github.com/advisories/GHSA-c4rq-3m3g-8wgx
notes: |
 - cvss_v3 from GHSA and nvd.nist.gov URLs.
 - cvss_v4 from nvd.nist.gov URL.

40 changes: 15 additions & 25 deletions
gems/nokogiri/GHSA-v2fc-qm4h-8hqv.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,45 +1,35 @@
---
gem: nokogiri
cve: 2026-79771
ghsa: v2fc-qm4h-8hqv
url: https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-v2fc-qm4h-8hqv
url: https://nvd.nist.gov/vuln/detail/CVE-2026-79771
title: Nokogiri XSLT transform has a memory leak
date: 2026-05-06
description: |
 ## Summary

 Nokogiri's `Nokogiri::XSLT::Stylesheet#transform` leaks a small heap allocation when passed a Ruby string parameter containing a null byte.

 For applications that pass attacker-controlled input through `XSLT.transform` parameters, this may be a vector for a denial of service attack against long-running processes.


 ## Mitigation

 Upgrade to Nokogiri `>= 1.19.3`.

 Users may also be able to mitigate this issue without upgrading by validating untrusted transform parameters before passing them to `Nokogiri::XSLT::Stylesheet#transform`.


 ## Severity

 The Nokogiri maintainers have evaluated this as **Moderate Severity**, CVSS 5.3.

 Each leaked allocation is approximately 24–32 bytes, so meaningful memory growth requires sustained attacker-controlled traffic at high call rates. The bug does not cause memory corruption, information disclosure, or any change in the behavior of the transform itself, and the string-handling exception is raised as expected.

 Applications that do not pass raw attacker-controlled bytes to XSLT parameters are unlikely to be affected in practice.


 ## Resources

 - [CWE-401: Missing Release of Memory after Effective Lifetime](https://cwe.mitre.org/data/definitions/401.html)
 Nokogiri's `Nokogiri::XSLT::Stylesheet#transform` leaks a small heap
 allocation when passed a Ruby string parameter containing a null byte.

 For applications that pass attacker-controlled input through
 `XSLT.transform` parameters, this may be a vector for a denial
 of service attack against long-running processes.

 ## Credit

 This vulnerability was responsibly reported by @Captainjack-kor.
cvss_v3: 5.3
cvss_v4: 6.9
patched_versions:
 - ">= 1.19.3"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-79771
 - https://rubygems.org/gems/nokogiri/versions/1.19.3
 - https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md#v1193--2026-04-27
 - https://www.vulncheck.com/advisories/nokogiri-before-memory-leak-via-xslt-transform
 - https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-v2fc-qm4h-8hqv
 - https://github.com/advisories/GHSA-v2fc-qm4h-8hqv
notes: |
 - cvss_v3 from GHSA and nvd.nist.gov URLs.
 - cvss_v4 from nvd.nist.gov URL.

31 changes: 13 additions & 18 deletions
gems/nokogiri/GHSA-wx95-c6cv-8532.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,7 +1,8 @@
---
gem: nokogiri
cve: 2026-79772
ghsa: wx95-c6cv-8532
url: https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wx95-c6cv-8532
url: https://nvd.nist.gov/vuln/detail/CVE-2026-79772
title: Nokogiri does not check the return value from xmlC14NExecute
date: 2026-02-18
description: |
Expand All@@ -15,32 +16,26 @@ description: |
 invalid or incomplete canonicalized XML, which has been demonstrated
 to enable signature validation bypass in SAML libraries.

 JRuby is not affected, as the Java implementation correctly
 raises `RuntimeError` on canonicalization failure.

 ## Mitigation

 Upgrade to Nokogiri `>= 1.19.1`.

 ## Severity

 The maintainers have assessed this as **Medium** severity. Nokogiri
 itself is a parsing library without a clear security boundary
 related to canonicalization, so the direct impact is that a method
 returns incorrect data on invalid input. However, this behavior
 was exploited in practice to bypass SAML signature validation
 in downstream libraries (see References).
 JRuby is not affected, as the Java implementation correctly raises
 `RuntimeError` on canonicalization failure.

 ## Credit

 This vulnerability was responsibly reported by HackerOne
 researcher `d4d`.
 This vulnerability was responsibly reported by HackerOne researcher `d4d`.
cvss_v3: 5.3
cvss_v4: 6.9
unaffected_versions:
 - "< 1.5.1"
patched_versions:
 - ">= 1.19.1"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-79772
 - https://rubygems.org/gems/nokogiri/versions/1.19.1
 - https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md#v1191--2026-02-16
 - https://www.vulncheck.com/advisories/nokogiri-before-unchecked-return-value-canonicalize
 - https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wx95-c6cv-8532
 - https://github.com/advisories/GHSA-wx95-c6cv-8532
notes: |
 - cvss_v3 from GHSA and nvd.nist.gov URLs.
 - cvss_v4 from nvd.nist.gov URL.

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Updated 4 existing advisories - mail, nokogiri#1235

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

 Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and
privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Open

jasnow
wants to merge
1
commit into

base:master
Choose a base branch

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+53

−71

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Updated 4 existing advisories - mail, nokogiri
#1235
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11 changes: 8 additions & 3 deletions
gems/mail/GHSA-mvxr-6m87-mv2q.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,5 +1,6 @@
---
gem: mail
cve: 2026-63435
ghsa: mvxr-6m87-mv2q
url: https://github.com/mikel/mail/security/advisories/GHSA-mvxr-6m87-mv2q
title: Email address spoofing via malformed RFC 2047 encoded-words in mail
Expand All@@ -14,15 +15,19 @@ description: |
 part could cause the decoded output to differ from what a human
 reviewer or downstream parser would expect, allowing an attacker
 to spoof the apparent sender/recipient address.
cvss_v3: 5.1
cvss_v3: 5.3
patched_versions:
 - ">= 2.9.1"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/cve-2026-63435
 - https://rubygems.org/gems/mail/versions/2.9.1
 - https://github.com/mikel/mail/releases/tag/2.9.1
 - https://github.com/mikel/mail/pull/1664
 - https://github.com/mikel/mail/commit/f9d59c2e447af42e2c3dec5a56b1bb25c7292859
 - https://osv.dev/vulnerability/GHSA-mvxr-6m87-mv2q
 - https://advisories.gitlab.com/gem/mail/CVE-2026-63435
 - https://github.com/mikel/mail/security/advisories/GHSA-mvxr-6m87-mv2q
 - https://github.com/advisories/GHSA-mvxr-6m87-mv2q
notes: |
 - cvss_v3, date from repo GHSA
 - No CVE value.
 - cvss_v3 from GHSA and nvd.nist.gov URLs.

42 changes: 17 additions & 25 deletions
gems/nokogiri/GHSA-c4rq-3m3g-8wgx.yml

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Original file line numberDiff line numberDiff line change
@@ -1,49 +1,41 @@
---
gem: nokogiri
cve: 2026-79770
ghsa: c4rq-3m3g-8wgx
url: https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-c4rq-3m3g-8wgx
title: Nokogiri CSS selector tokenizer has regular expression backtracking
date: 2026-05-06
description: |
 ## Summary

 Nokogiri's CSS selector tokenizer contains regular expressions whose construction may result in exponential regex backtracking on adversarial selectors. Three ReDoS vectors are addressed in this release:
 Nokogiri's CSS selector tokenizer contains regular expressions whose
 construction may result in exponential regex backtracking on adversarial
 selectors. Three ReDoS vectors are addressed in this release:

 1. String-literal tokenization on certain unterminated quoted-string input.
 2. String-literal tokenization on a separate class of hex-escape-rich input.
 3. Identifier tokenization on hex-escape-rich input.

 The public CSS selector methods that funnel through the affected tokenizer are `Nokogiri::CSS.xpath_for`, `Node#css`, `Node#at_css`, `Searchable#search`, and `CSS::Parser#parse`.


 ## Mitigation

 Upgrade to Nokogiri `>= 1.19.3`.

 If users are unable to upgrade, two options are available:

 - Avoid the use of attacker-controlled text in CSS selectors. Applications that only pass developer-authored selectors to Nokogiri are not directly exposed.
 - Set global `Regexp.timeout` (Ruby 3.2+, JRuby 9.4+) to bound parse time.

 ## Severity

 The Nokogiri maintainers have evaluated this as **High Severity** (CVSS 7.5, `AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`).

 An attacker able to inject user-supplied text into a CSS selector parse method can cause exponential backtracking, resulting in a potential denial of service.


 ## Resources

 - [CWE-1333: Inefficient Regular Expression Complexity](https://cwe.mitre.org/data/definitions/1333.html)

 The public CSS selector methods that funnel through the affected
 tokenizer are `Nokogiri::CSS.xpath_for`, `Node#css`, `Node#at_css`,
 `Searchable#search`, and `CSS::Parser#parse`.

 ## Credit

 Vector 1 was responsibly reported by @colby-swandale. Vectors 2 and 3 were discovered by @flavorjones during the response to the original report.
 Vector 1 was responsibly reported by @colby-swandale. Vectors 2 and 3
 were discovered by @flavorjones during the response to the original report.
cvss_v3: 7.5
cvss_v4: 8.7
patched_versions:
 - ">= 1.19.3"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-79770
 - https://rubygems.org/gems/nokogiri/versions/1.19.3
 - https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md#v1193--2026-04-27
 - https://www.vulncheck.com/advisories/nokogiri-before-redos-via-css-selector-tokenizer
 - https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-c4rq-3m3g-8wgx
 - https://github.com/advisories/GHSA-c4rq-3m3g-8wgx
notes: |
 - cvss_v3 from GHSA and nvd.nist.gov URLs.
 - cvss_v4 from nvd.nist.gov URL.

40 changes: 15 additions & 25 deletions
gems/nokogiri/GHSA-v2fc-qm4h-8hqv.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,45 +1,35 @@
---
gem: nokogiri
cve: 2026-79771
ghsa: v2fc-qm4h-8hqv
url: https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-v2fc-qm4h-8hqv
url: https://nvd.nist.gov/vuln/detail/CVE-2026-79771
title: Nokogiri XSLT transform has a memory leak
date: 2026-05-06
description: |
 ## Summary

 Nokogiri's `Nokogiri::XSLT::Stylesheet#transform` leaks a small heap allocation when passed a Ruby string parameter containing a null byte.

 For applications that pass attacker-controlled input through `XSLT.transform` parameters, this may be a vector for a denial of service attack against long-running processes.


 ## Mitigation

 Upgrade to Nokogiri `>= 1.19.3`.

 Users may also be able to mitigate this issue without upgrading by validating untrusted transform parameters before passing them to `Nokogiri::XSLT::Stylesheet#transform`.


 ## Severity

 The Nokogiri maintainers have evaluated this as **Moderate Severity**, CVSS 5.3.

 Each leaked allocation is approximately 24–32 bytes, so meaningful memory growth requires sustained attacker-controlled traffic at high call rates. The bug does not cause memory corruption, information disclosure, or any change in the behavior of the transform itself, and the string-handling exception is raised as expected.

 Applications that do not pass raw attacker-controlled bytes to XSLT parameters are unlikely to be affected in practice.


 ## Resources

 - [CWE-401: Missing Release of Memory after Effective Lifetime](https://cwe.mitre.org/data/definitions/401.html)
 Nokogiri's `Nokogiri::XSLT::Stylesheet#transform` leaks a small heap
 allocation when passed a Ruby string parameter containing a null byte.

 For applications that pass attacker-controlled input through
 `XSLT.transform` parameters, this may be a vector for a denial
 of service attack against long-running processes.

 ## Credit

 This vulnerability was responsibly reported by @Captainjack-kor.
cvss_v3: 5.3
cvss_v4: 6.9
patched_versions:
 - ">= 1.19.3"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-79771
 - https://rubygems.org/gems/nokogiri/versions/1.19.3
 - https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md#v1193--2026-04-27
 - https://www.vulncheck.com/advisories/nokogiri-before-memory-leak-via-xslt-transform
 - https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-v2fc-qm4h-8hqv
 - https://github.com/advisories/GHSA-v2fc-qm4h-8hqv
notes: |
 - cvss_v3 from GHSA and nvd.nist.gov URLs.
 - cvss_v4 from nvd.nist.gov URL.

31 changes: 13 additions & 18 deletions
gems/nokogiri/GHSA-wx95-c6cv-8532.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,7 +1,8 @@
---
gem: nokogiri
cve: 2026-79772
ghsa: wx95-c6cv-8532
url: https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wx95-c6cv-8532
url: https://nvd.nist.gov/vuln/detail/CVE-2026-79772
title: Nokogiri does not check the return value from xmlC14NExecute
date: 2026-02-18
description: |
Expand All@@ -15,32 +16,26 @@ description: |
 invalid or incomplete canonicalized XML, which has been demonstrated
 to enable signature validation bypass in SAML libraries.

 JRuby is not affected, as the Java implementation correctly
 raises `RuntimeError` on canonicalization failure.

 ## Mitigation

 Upgrade to Nokogiri `>= 1.19.1`.

 ## Severity

 The maintainers have assessed this as **Medium** severity. Nokogiri
 itself is a parsing library without a clear security boundary
 related to canonicalization, so the direct impact is that a method
 returns incorrect data on invalid input. However, this behavior
 was exploited in practice to bypass SAML signature validation
 in downstream libraries (see References).
 JRuby is not affected, as the Java implementation correctly raises
 `RuntimeError` on canonicalization failure.

 ## Credit

 This vulnerability was responsibly reported by HackerOne
 researcher `d4d`.
 This vulnerability was responsibly reported by HackerOne researcher `d4d`.
cvss_v3: 5.3
cvss_v4: 6.9
unaffected_versions:
 - "< 1.5.1"
patched_versions:
 - ">= 1.19.1"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-79772
 - https://rubygems.org/gems/nokogiri/versions/1.19.1
 - https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md#v1191--2026-02-16
 - https://www.vulncheck.com/advisories/nokogiri-before-unchecked-return-value-canonicalize
 - https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wx95-c6cv-8532
 - https://github.com/advisories/GHSA-wx95-c6cv-8532
notes: |
 - cvss_v3 from GHSA and nvd.nist.gov URLs.
 - cvss_v4 from nvd.nist.gov URL.

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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Updated 4 existing advisories - mail, nokogiri#1235

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11 changes: 8 additions & 3 deletions
gems/mail/GHSA-mvxr-6m87-mv2q.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,5 +1,6 @@
---
gem: mail
cve: 2026-63435
ghsa: mvxr-6m87-mv2q
url: https://github.com/mikel/mail/security/advisories/GHSA-mvxr-6m87-mv2q
title: Email address spoofing via malformed RFC 2047 encoded-words in mail
Expand All@@ -14,15 +15,19 @@ description: |
 part could cause the decoded output to differ from what a human
 reviewer or downstream parser would expect, allowing an attacker
 to spoof the apparent sender/recipient address.
cvss_v3: 5.1
cvss_v3: 5.3
patched_versions:
 - ">= 2.9.1"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/cve-2026-63435
 - https://rubygems.org/gems/mail/versions/2.9.1
 - https://github.com/mikel/mail/releases/tag/2.9.1
 - https://github.com/mikel/mail/pull/1664
 - https://github.com/mikel/mail/commit/f9d59c2e447af42e2c3dec5a56b1bb25c7292859
 - https://osv.dev/vulnerability/GHSA-mvxr-6m87-mv2q
 - https://advisories.gitlab.com/gem/mail/CVE-2026-63435
 - https://github.com/mikel/mail/security/advisories/GHSA-mvxr-6m87-mv2q
 - https://github.com/advisories/GHSA-mvxr-6m87-mv2q
notes: |
 - cvss_v3, date from repo GHSA
 - No CVE value.
 - cvss_v3 from GHSA and nvd.nist.gov URLs.

42 changes: 17 additions & 25 deletions
gems/nokogiri/GHSA-c4rq-3m3g-8wgx.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,49 +1,41 @@
---
gem: nokogiri
cve: 2026-79770
ghsa: c4rq-3m3g-8wgx
url: https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-c4rq-3m3g-8wgx
title: Nokogiri CSS selector tokenizer has regular expression backtracking
date: 2026-05-06
description: |
 ## Summary

 Nokogiri's CSS selector tokenizer contains regular expressions whose construction may result in exponential regex backtracking on adversarial selectors. Three ReDoS vectors are addressed in this release:
 Nokogiri's CSS selector tokenizer contains regular expressions whose
 construction may result in exponential regex backtracking on adversarial
 selectors. Three ReDoS vectors are addressed in this release:

 1. String-literal tokenization on certain unterminated quoted-string input.
 2. String-literal tokenization on a separate class of hex-escape-rich input.
 3. Identifier tokenization on hex-escape-rich input.

 The public CSS selector methods that funnel through the affected tokenizer are `Nokogiri::CSS.xpath_for`, `Node#css`, `Node#at_css`, `Searchable#search`, and `CSS::Parser#parse`.


 ## Mitigation

 Upgrade to Nokogiri `>= 1.19.3`.

 If users are unable to upgrade, two options are available:

 - Avoid the use of attacker-controlled text in CSS selectors. Applications that only pass developer-authored selectors to Nokogiri are not directly exposed.
 - Set global `Regexp.timeout` (Ruby 3.2+, JRuby 9.4+) to bound parse time.

 ## Severity

 The Nokogiri maintainers have evaluated this as **High Severity** (CVSS 7.5, `AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`).

 An attacker able to inject user-supplied text into a CSS selector parse method can cause exponential backtracking, resulting in a potential denial of service.


 ## Resources

 - [CWE-1333: Inefficient Regular Expression Complexity](https://cwe.mitre.org/data/definitions/1333.html)

 The public CSS selector methods that funnel through the affected
 tokenizer are `Nokogiri::CSS.xpath_for`, `Node#css`, `Node#at_css`,
 `Searchable#search`, and `CSS::Parser#parse`.

 ## Credit

 Vector 1 was responsibly reported by @colby-swandale. Vectors 2 and 3 were discovered by @flavorjones during the response to the original report.
 Vector 1 was responsibly reported by @colby-swandale. Vectors 2 and 3
 were discovered by @flavorjones during the response to the original report.
cvss_v3: 7.5
cvss_v4: 8.7
patched_versions:
 - ">= 1.19.3"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-79770
 - https://rubygems.org/gems/nokogiri/versions/1.19.3
 - https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md#v1193--2026-04-27
 - https://www.vulncheck.com/advisories/nokogiri-before-redos-via-css-selector-tokenizer
 - https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-c4rq-3m3g-8wgx
 - https://github.com/advisories/GHSA-c4rq-3m3g-8wgx
notes: |
 - cvss_v3 from GHSA and nvd.nist.gov URLs.
 - cvss_v4 from nvd.nist.gov URL.

40 changes: 15 additions & 25 deletions
gems/nokogiri/GHSA-v2fc-qm4h-8hqv.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,45 +1,35 @@
---
gem: nokogiri
cve: 2026-79771
ghsa: v2fc-qm4h-8hqv
url: https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-v2fc-qm4h-8hqv
url: https://nvd.nist.gov/vuln/detail/CVE-2026-79771
title: Nokogiri XSLT transform has a memory leak
date: 2026-05-06
description: |
 ## Summary

 Nokogiri's `Nokogiri::XSLT::Stylesheet#transform` leaks a small heap allocation when passed a Ruby string parameter containing a null byte.

 For applications that pass attacker-controlled input through `XSLT.transform` parameters, this may be a vector for a denial of service attack against long-running processes.


 ## Mitigation

 Upgrade to Nokogiri `>= 1.19.3`.

 Users may also be able to mitigate this issue without upgrading by validating untrusted transform parameters before passing them to `Nokogiri::XSLT::Stylesheet#transform`.


 ## Severity

 The Nokogiri maintainers have evaluated this as **Moderate Severity**, CVSS 5.3.

 Each leaked allocation is approximately 24–32 bytes, so meaningful memory growth requires sustained attacker-controlled traffic at high call rates. The bug does not cause memory corruption, information disclosure, or any change in the behavior of the transform itself, and the string-handling exception is raised as expected.

 Applications that do not pass raw attacker-controlled bytes to XSLT parameters are unlikely to be affected in practice.


 ## Resources

 - [CWE-401: Missing Release of Memory after Effective Lifetime](https://cwe.mitre.org/data/definitions/401.html)
 Nokogiri's `Nokogiri::XSLT::Stylesheet#transform` leaks a small heap
 allocation when passed a Ruby string parameter containing a null byte.

 For applications that pass attacker-controlled input through
 `XSLT.transform` parameters, this may be a vector for a denial
 of service attack against long-running processes.

 ## Credit

 This vulnerability was responsibly reported by @Captainjack-kor.
cvss_v3: 5.3
cvss_v4: 6.9
patched_versions:
 - ">= 1.19.3"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-79771
 - https://rubygems.org/gems/nokogiri/versions/1.19.3
 - https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md#v1193--2026-04-27
 - https://www.vulncheck.com/advisories/nokogiri-before-memory-leak-via-xslt-transform
 - https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-v2fc-qm4h-8hqv
 - https://github.com/advisories/GHSA-v2fc-qm4h-8hqv
notes: |
 - cvss_v3 from GHSA and nvd.nist.gov URLs.
 - cvss_v4 from nvd.nist.gov URL.

31 changes: 13 additions & 18 deletions
gems/nokogiri/GHSA-wx95-c6cv-8532.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,7 +1,8 @@
---
gem: nokogiri
cve: 2026-79772
ghsa: wx95-c6cv-8532
url: https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wx95-c6cv-8532
url: https://nvd.nist.gov/vuln/detail/CVE-2026-79772
title: Nokogiri does not check the return value from xmlC14NExecute
date: 2026-02-18
description: |
Expand All@@ -15,32 +16,26 @@ description: |
 invalid or incomplete canonicalized XML, which has been demonstrated
 to enable signature validation bypass in SAML libraries.

 JRuby is not affected, as the Java implementation correctly
 raises `RuntimeError` on canonicalization failure.

 ## Mitigation

 Upgrade to Nokogiri `>= 1.19.1`.

 ## Severity

 The maintainers have assessed this as **Medium** severity. Nokogiri
 itself is a parsing library without a clear security boundary
 related to canonicalization, so the direct impact is that a method
 returns incorrect data on invalid input. However, this behavior
 was exploited in practice to bypass SAML signature validation
 in downstream libraries (see References).
 JRuby is not affected, as the Java implementation correctly raises
 `RuntimeError` on canonicalization failure.

 ## Credit

 This vulnerability was responsibly reported by HackerOne
 researcher `d4d`.
 This vulnerability was responsibly reported by HackerOne researcher `d4d`.
cvss_v3: 5.3
cvss_v4: 6.9
unaffected_versions:
 - "< 1.5.1"
patched_versions:
 - ">= 1.19.1"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-79772
 - https://rubygems.org/gems/nokogiri/versions/1.19.1
 - https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md#v1191--2026-02-16
 - https://www.vulncheck.com/advisories/nokogiri-before-unchecked-return-value-canonicalize
 - https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wx95-c6cv-8532
 - https://github.com/advisories/GHSA-wx95-c6cv-8532
notes: |
 - cvss_v3 from GHSA and nvd.nist.gov URLs.
 - cvss_v4 from nvd.nist.gov URL.