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New rails-mcp-server advisory #1228

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44 changes: 44 additions & 0 deletions gems/rails-mcp-server/CVE-2026-81097.yml
View file
Open in desktop
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,44 @@
---
gem: rails-mcp-server
cve: 2026-81097
ghsa: 247c-497m-jx82
url: https://nvd.nist.gov/vuln/detail/CVE-2026-81097
title: The execute_ruby tool is documented as a read-only Ruby sandbox
date: 2026-08-27
description: |
The execute_ruby tool is documented as a read-only Ruby sandbox
and is enforced by a pattern denylist together with replacements
for the process-spawning methods on Kernel.

The pseudo-terminal library's spawn entry points are neither in the
denylist nor replaced, so a normal tool call could reach them and
start a shell, executing commands as the account running the server
and outside the guarded methods.

The denylist was introduced with the tool in 1.4.0 and
never covered those entry points through 1.6.0.

Version 1.6.1 restricts the requires the sandbox permits to a
data-only list and blocks dynamic dispatch to execution entry
points.

2.0.0 removes the tool.
cvss_v3: 8.4
cvss_v4: 8.6
unaffected_versions:
- "< 1.4.0"
patched_versions:
- ">= 1.6.1"
related:
url:
- https://nvd.nist.gov/vuln/detail/CVE-2026-81097

- https://rubygems.org/gems/rails-mcp-server/versions/2.0.0
- https://github.com/maquina-app/rails-mcp-server/releases/tag/v2.0.0
- https://rubygems.org/gems/rails-mcp-server/versions/1.6.1
- https://github.com/maquina-app/rails-mcp-server/releases/tag/v1.6.1
- https://github.com/maquina-app/rails-mcp-server/pull/59
- https://www.vulncheck.com/advisories/rails-mcp-server-1.4.0-through-1.6.0-os-command-execution-via-execute-ruby-pty-escape
- https://github.com/advisories/GHSA-247c-497m-jx82
notes: |
- cvss_v3 and 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" + '

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New rails-mcp-server advisory#1228

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 Merged

jasnow
merged 1 commit into

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Aug 29, 2026
 Merged


New rails-mcp-server advisory
#1228
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44 changes: 44 additions & 0 deletions
gems/rails-mcp-server/CVE-2026-81097.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,44 @@
---
gem: rails-mcp-server
cve: 2026-81097
ghsa: 247c-497m-jx82
url: https://nvd.nist.gov/vuln/detail/CVE-2026-81097
title: The execute_ruby tool is documented as a read-only Ruby sandbox
date: 2026-08-27
description: |
 The execute_ruby tool is documented as a read-only Ruby sandbox
 and is enforced by a pattern denylist together with replacements
 for the process-spawning methods on Kernel.

 The pseudo-terminal library's spawn entry points are neither in the
 denylist nor replaced, so a normal tool call could reach them and
 start a shell, executing commands as the account running the server
 and outside the guarded methods.

 The denylist was introduced with the tool in 1.4.0 and
 never covered those entry points through 1.6.0.

 Version 1.6.1 restricts the requires the sandbox permits to a
 data-only list and blocks dynamic dispatch to execution entry
 points.

 2.0.0 removes the tool.
cvss_v3: 8.4
cvss_v4: 8.6
unaffected_versions:
 - "< 1.4.0"
patched_versions:
 - ">= 1.6.1"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-81097

 - https://rubygems.org/gems/rails-mcp-server/versions/2.0.0
 - https://github.com/maquina-app/rails-mcp-server/releases/tag/v2.0.0
 - https://rubygems.org/gems/rails-mcp-server/versions/1.6.1
 - https://github.com/maquina-app/rails-mcp-server/releases/tag/v1.6.1
 - https://github.com/maquina-app/rails-mcp-server/pull/59
 - https://www.vulncheck.com/advisories/rails-mcp-server-1.4.0-through-1.6.0-os-command-execution-via-execute-ruby-pty-escape
 - https://github.com/advisories/GHSA-247c-497m-jx82
notes: |
 - cvss_v3 and 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('^' + ".*" + '

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New rails-mcp-server advisory#1228

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 Merged

jasnow
merged 1 commit into

from

Aug 29, 2026
 Merged


New rails-mcp-server advisory
#1228
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44 changes: 44 additions & 0 deletions
gems/rails-mcp-server/CVE-2026-81097.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,44 @@
---
gem: rails-mcp-server
cve: 2026-81097
ghsa: 247c-497m-jx82
url: https://nvd.nist.gov/vuln/detail/CVE-2026-81097
title: The execute_ruby tool is documented as a read-only Ruby sandbox
date: 2026-08-27
description: |
 The execute_ruby tool is documented as a read-only Ruby sandbox
 and is enforced by a pattern denylist together with replacements
 for the process-spawning methods on Kernel.

 The pseudo-terminal library's spawn entry points are neither in the
 denylist nor replaced, so a normal tool call could reach them and
 start a shell, executing commands as the account running the server
 and outside the guarded methods.

 The denylist was introduced with the tool in 1.4.0 and
 never covered those entry points through 1.6.0.

 Version 1.6.1 restricts the requires the sandbox permits to a
 data-only list and blocks dynamic dispatch to execution entry
 points.

 2.0.0 removes the tool.
cvss_v3: 8.4
cvss_v4: 8.6
unaffected_versions:
 - "< 1.4.0"
patched_versions:
 - ">= 1.6.1"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-81097

 - https://rubygems.org/gems/rails-mcp-server/versions/2.0.0
 - https://github.com/maquina-app/rails-mcp-server/releases/tag/v2.0.0
 - https://rubygems.org/gems/rails-mcp-server/versions/1.6.1
 - https://github.com/maquina-app/rails-mcp-server/releases/tag/v1.6.1
 - https://github.com/maquina-app/rails-mcp-server/pull/59
 - https://www.vulncheck.com/advisories/rails-mcp-server-1.4.0-through-1.6.0-os-command-execution-via-execute-ruby-pty-escape
 - https://github.com/advisories/GHSA-247c-497m-jx82
notes: |
 - cvss_v3 and 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('^' + ".*" + '

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New rails-mcp-server advisory#1228

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 Merged

jasnow
merged 1 commit into

from

Aug 29, 2026
 Merged


New rails-mcp-server advisory
#1228
 Changes from all commits
Commits

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44 changes: 44 additions & 0 deletions
gems/rails-mcp-server/CVE-2026-81097.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,44 @@
---
gem: rails-mcp-server
cve: 2026-81097
ghsa: 247c-497m-jx82
url: https://nvd.nist.gov/vuln/detail/CVE-2026-81097
title: The execute_ruby tool is documented as a read-only Ruby sandbox
date: 2026-08-27
description: |
 The execute_ruby tool is documented as a read-only Ruby sandbox
 and is enforced by a pattern denylist together with replacements
 for the process-spawning methods on Kernel.

 The pseudo-terminal library's spawn entry points are neither in the
 denylist nor replaced, so a normal tool call could reach them and
 start a shell, executing commands as the account running the server
 and outside the guarded methods.

 The denylist was introduced with the tool in 1.4.0 and
 never covered those entry points through 1.6.0.

 Version 1.6.1 restricts the requires the sandbox permits to a
 data-only list and blocks dynamic dispatch to execution entry
 points.

 2.0.0 removes the tool.
cvss_v3: 8.4
cvss_v4: 8.6
unaffected_versions:
 - "< 1.4.0"
patched_versions:
 - ">= 1.6.1"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-81097

 - https://rubygems.org/gems/rails-mcp-server/versions/2.0.0
 - https://github.com/maquina-app/rails-mcp-server/releases/tag/v2.0.0
 - https://rubygems.org/gems/rails-mcp-server/versions/1.6.1
 - https://github.com/maquina-app/rails-mcp-server/releases/tag/v1.6.1
 - https://github.com/maquina-app/rails-mcp-server/pull/59
 - https://www.vulncheck.com/advisories/rails-mcp-server-1.4.0-through-1.6.0-os-command-execution-via-execute-ruby-pty-escape
 - https://github.com/advisories/GHSA-247c-497m-jx82
notes: |
 - cvss_v3 and 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" + '

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New rails-mcp-server advisory#1228

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 Merged

jasnow
merged 1 commit into

from

Aug 29, 2026
 Merged


New rails-mcp-server advisory
#1228
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44 changes: 44 additions & 0 deletions
gems/rails-mcp-server/CVE-2026-81097.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,44 @@
---
gem: rails-mcp-server
cve: 2026-81097
ghsa: 247c-497m-jx82
url: https://nvd.nist.gov/vuln/detail/CVE-2026-81097
title: The execute_ruby tool is documented as a read-only Ruby sandbox
date: 2026-08-27
description: |
 The execute_ruby tool is documented as a read-only Ruby sandbox
 and is enforced by a pattern denylist together with replacements
 for the process-spawning methods on Kernel.

 The pseudo-terminal library's spawn entry points are neither in the
 denylist nor replaced, so a normal tool call could reach them and
 start a shell, executing commands as the account running the server
 and outside the guarded methods.

 The denylist was introduced with the tool in 1.4.0 and
 never covered those entry points through 1.6.0.

 Version 1.6.1 restricts the requires the sandbox permits to a
 data-only list and blocks dynamic dispatch to execution entry
 points.

 2.0.0 removes the tool.
cvss_v3: 8.4
cvss_v4: 8.6
unaffected_versions:
 - "< 1.4.0"
patched_versions:
 - ">= 1.6.1"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-81097

 - https://rubygems.org/gems/rails-mcp-server/versions/2.0.0
 - https://github.com/maquina-app/rails-mcp-server/releases/tag/v2.0.0
 - https://rubygems.org/gems/rails-mcp-server/versions/1.6.1
 - https://github.com/maquina-app/rails-mcp-server/releases/tag/v1.6.1
 - https://github.com/maquina-app/rails-mcp-server/pull/59
 - https://www.vulncheck.com/advisories/rails-mcp-server-1.4.0-through-1.6.0-os-command-execution-via-execute-ruby-pty-escape
 - https://github.com/advisories/GHSA-247c-497m-jx82
notes: |
 - cvss_v3 and 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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New rails-mcp-server advisory#1228

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.

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

Already on GitHub?
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 Merged

jasnow
merged 1 commit into

from

Aug 29, 2026
 Merged


New rails-mcp-server advisory
#1228
 Changes from all commits
Commits

Show all changes


1 commit


Select commit


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44 changes: 44 additions & 0 deletions
gems/rails-mcp-server/CVE-2026-81097.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,44 @@
---
gem: rails-mcp-server
cve: 2026-81097
ghsa: 247c-497m-jx82
url: https://nvd.nist.gov/vuln/detail/CVE-2026-81097
title: The execute_ruby tool is documented as a read-only Ruby sandbox
date: 2026-08-27
description: |
 The execute_ruby tool is documented as a read-only Ruby sandbox
 and is enforced by a pattern denylist together with replacements
 for the process-spawning methods on Kernel.

 The pseudo-terminal library's spawn entry points are neither in the
 denylist nor replaced, so a normal tool call could reach them and
 start a shell, executing commands as the account running the server
 and outside the guarded methods.

 The denylist was introduced with the tool in 1.4.0 and
 never covered those entry points through 1.6.0.

 Version 1.6.1 restricts the requires the sandbox permits to a
 data-only list and blocks dynamic dispatch to execution entry
 points.

 2.0.0 removes the tool.
cvss_v3: 8.4
cvss_v4: 8.6
unaffected_versions:
 - "< 1.4.0"
patched_versions:
 - ">= 1.6.1"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-81097

 - https://rubygems.org/gems/rails-mcp-server/versions/2.0.0
 - https://github.com/maquina-app/rails-mcp-server/releases/tag/v2.0.0
 - https://rubygems.org/gems/rails-mcp-server/versions/1.6.1
 - https://github.com/maquina-app/rails-mcp-server/releases/tag/v1.6.1
 - https://github.com/maquina-app/rails-mcp-server/pull/59
 - https://www.vulncheck.com/advisories/rails-mcp-server-1.4.0-through-1.6.0-os-command-execution-via-execute-ruby-pty-escape
 - https://github.com/advisories/GHSA-247c-497m-jx82
notes: |
 - cvss_v3 and 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('^' + ".*" + '

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44 changes: 44 additions & 0 deletions
gems/rails-mcp-server/CVE-2026-81097.yml

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,44 @@
---
gem: rails-mcp-server
cve: 2026-81097
ghsa: 247c-497m-jx82
url: https://nvd.nist.gov/vuln/detail/CVE-2026-81097
title: The execute_ruby tool is documented as a read-only Ruby sandbox
date: 2026-08-27
description: |
 The execute_ruby tool is documented as a read-only Ruby sandbox
 and is enforced by a pattern denylist together with replacements
 for the process-spawning methods on Kernel.

 The pseudo-terminal library's spawn entry points are neither in the
 denylist nor replaced, so a normal tool call could reach them and
 start a shell, executing commands as the account running the server
 and outside the guarded methods.

 The denylist was introduced with the tool in 1.4.0 and
 never covered those entry points through 1.6.0.

 Version 1.6.1 restricts the requires the sandbox permits to a
 data-only list and blocks dynamic dispatch to execution entry
 points.

 2.0.0 removes the tool.
cvss_v3: 8.4
cvss_v4: 8.6
unaffected_versions:
 - "< 1.4.0"
patched_versions:
 - ">= 1.6.1"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-81097

 - https://rubygems.org/gems/rails-mcp-server/versions/2.0.0
 - https://github.com/maquina-app/rails-mcp-server/releases/tag/v2.0.0
 - https://rubygems.org/gems/rails-mcp-server/versions/1.6.1
 - https://github.com/maquina-app/rails-mcp-server/releases/tag/v1.6.1
 - https://github.com/maquina-app/rails-mcp-server/pull/59
 - https://www.vulncheck.com/advisories/rails-mcp-server-1.4.0-through-1.6.0-os-command-execution-via-execute-ruby-pty-escape
 - https://github.com/advisories/GHSA-247c-497m-jx82
notes: |
 - cvss_v3 and 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); }
})();
})();

Skip to content
New rails-mcp-server advisory#1228

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.

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

Already on GitHub?
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 Merged

jasnow
merged 1 commit into

from

Aug 29, 2026
 Merged


New rails-mcp-server advisory
#1228
 Changes from all commits
Commits

Show all changes


1 commit


Select commit


File filter

Filter by extension
Filter by extension
Conversations

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44 changes: 44 additions & 0 deletions
gems/rails-mcp-server/CVE-2026-81097.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,44 @@
---
gem: rails-mcp-server
cve: 2026-81097
ghsa: 247c-497m-jx82
url: https://nvd.nist.gov/vuln/detail/CVE-2026-81097
title: The execute_ruby tool is documented as a read-only Ruby sandbox
date: 2026-08-27
description: |
 The execute_ruby tool is documented as a read-only Ruby sandbox
 and is enforced by a pattern denylist together with replacements
 for the process-spawning methods on Kernel.

 The pseudo-terminal library's spawn entry points are neither in the
 denylist nor replaced, so a normal tool call could reach them and
 start a shell, executing commands as the account running the server
 and outside the guarded methods.

 The denylist was introduced with the tool in 1.4.0 and
 never covered those entry points through 1.6.0.

 Version 1.6.1 restricts the requires the sandbox permits to a
 data-only list and blocks dynamic dispatch to execution entry
 points.

 2.0.0 removes the tool.
cvss_v3: 8.4
cvss_v4: 8.6
unaffected_versions:
 - "< 1.4.0"
patched_versions:
 - ">= 1.6.1"
related:
 url:
 - https://nvd.nist.gov/vuln/detail/CVE-2026-81097

 - https://rubygems.org/gems/rails-mcp-server/versions/2.0.0
 - https://github.com/maquina-app/rails-mcp-server/releases/tag/v2.0.0
 - https://rubygems.org/gems/rails-mcp-server/versions/1.6.1
 - https://github.com/maquina-app/rails-mcp-server/releases/tag/v1.6.1
 - https://github.com/maquina-app/rails-mcp-server/pull/59
 - https://www.vulncheck.com/advisories/rails-mcp-server-1.4.0-through-1.6.0-os-command-execution-via-execute-ruby-pty-escape
 - https://github.com/advisories/GHSA-247c-497m-jx82
notes: |
 - cvss_v3 and cvss_v4 from nvd.nist.gov URL.