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vfs: dispatch fs/promises to mounted VFS instances - #63537

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vfs: dispatch fs/promises to mounted VFS instances#63537
nodejs-github-bot merged 1 commit into
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mcollina:vfs-mount-integration

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@mcollinamcollina commented May 24, 2026•
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  • Add mount/unmount on VirtualFileSystem plus a handler registry consulted by lib/fs.js, lib/internal/fs/promises.js, and lib/internal/fs/dir.js via vfsState.handlers.
  • Route absolute paths to the VFS that owns them, so the public fs.* and fs/promises APIs (sync, callback, promise, streams, fs.watch, opendir) dispatch to the mounted provider and fall through to the real filesystem otherwise.

Ref: #63115

@nodejs-github-botnodejs-github-bot added lib / src Issues and PRs related to general changes in the lib or src directory. needs-ci PRs that need a full CI run. labels May 24, 2026
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Codecov Report

❌ Patch coverage is 92.70440% with 116 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.33%. Comparing base (74ccf38) to head (1a72c52).
⚠️ Report is 71 commits behind head on main.

Files with missing linesPatch %Lines
lib/internal/vfs/setup.js86.68%87 Missing and 1 partial ⚠️
lib/internal/fs/promises.js93.29%10 Missing and 1 partial ⚠️
lib/internal/vfs/file_system.js93.93%8 Missing ⚠️
lib/fs.js99.26%4 Missing ⚠️
lib/internal/fs/dir.js80.95%4 Missing ⚠️
lib/internal/vfs/router.js97.82%0 Missing and 1 partial ⚠️
Additional details and impacted files
@@ Coverage Diff @@## main #63537 +/- ##
=========================================
Coverage 90.32% 90.33% =========================================
Files 730 732 +2 Lines 234209 236357 +2148 Branches 43934 44496 +562 =========================================
+ Hits 211558 213505 +1947 - Misses 14372 14562 +190 - Partials 8279 8290 +11
Files with missing linesCoverage Δ
lib/internal/fs/utils.js98.44% <100.00%> (+<0.01%)⬆️
lib/internal/vfs/errors.js100.00% <100.00%> (ø)
lib/internal/vfs/router.js97.82% <97.82%> (ø)
lib/fs.js98.33% <99.26%> (+0.13%)⬆️
lib/internal/fs/dir.js93.84% <80.95%> (-0.74%)⬇️
lib/internal/vfs/file_system.js99.21% <93.93%> (+2.52%)⬆️
lib/internal/fs/promises.js92.94% <93.29%> (+0.06%)⬆️
lib/internal/vfs/setup.js86.68% <86.68%> (ø)

... and 80 files with indirect coverage changes

🚀 New features to boost your workflow:
  • ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
  • 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

@mcollinamcollina added request-ci Add this label to start a Jenkins CI on a PR. semver-minor PRs that contain new features and should be released in the next minor version. labels May 24, 2026
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CI: https://ci.nodejs.org/job/node-test-pull-request/73672/

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CI: https://ci.nodejs.org/job/node-test-pull-request/73708/

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mcollinaforce-pushed the vfs-mount-integration branch from fe4a688 to 708a5faCompareMay 25, 2026 17:38
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CI: https://ci.nodejs.org/job/node-test-pull-request/73823/

@mcollina
mcollinaforce-pushed the vfs-mount-integration branch from 708a5fa to 7fb883aCompareMay 29, 2026 10:37
@mcollina
vfs: dispatch fs/promises to mounted VFS instances
1a72c52
Add mount/unmount lifecycle on `VirtualFileSystem`, a handler registry
that fs.js and fs/promises.js consult via `vfsState.handlers`, and a
router that maps absolute paths to the VFS that owns them. When a VFS
is mounted, the public `fs.*` and `fs/promises` APIs (including
streams, `fs.watch`, and `opendir`) dispatch to the provider for paths
under the mount point, and fall through to the real filesystem
otherwise. Includes per-method dispatch tests, error-path coverage,
multi-mount routing tests, and router unit tests.
Ref: nodejs#63115
Signed-off-by: Matteo Collina <hello@matteocollina.com>
@mcollina
mcollinaforce-pushed the vfs-mount-integration branch from 7fb883a to 1a72c52CompareMay 29, 2026 10:54
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LGTM!

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CI: https://ci.nodejs.org/job/node-test-pull-request/73825/

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CI: https://ci.nodejs.org/job/node-test-pull-request/73828/

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nodejs-github-bot merged commit 569369f into nodejs:mainMay 29, 2026
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aduh95 pushed a commit that referenced this pull request Jun 20, 2026
@mcollina@aduh95
vfs: dispatch fs/promises to mounted VFS instances
b17817e
Add mount/unmount lifecycle on `VirtualFileSystem`, a handler registry
that fs.js and fs/promises.js consult via `vfsState.handlers`, and a
router that maps absolute paths to the VFS that owns them. When a VFS
is mounted, the public `fs.*` and `fs/promises` APIs (including
streams, `fs.watch`, and `opendir`) dispatch to the provider for paths
under the mount point, and fall through to the real filesystem
otherwise. Includes per-method dispatch tests, error-path coverage,
multi-mount routing tests, and router unit tests.
Ref: #63115
Signed-off-by: Matteo Collina <hello@matteocollina.com>
PR-URL: #63537
Refs: #63115
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Paolo Insogna <paolo@cowtech.it>
@github-actionsgithub-actionsBot mentioned this pull request Jun 22, 2026
Merged
nodejs-github-bot added a commit that referenced this pull request Jun 22, 2026
@nodejs-github-bot
2026-06-23, Version 26.4.0 (Current)
950c7dd
Notable changes:
build, doc:
* generate node.1 with doc-kit (Aviv Keller) #62044
deps:
* (SEMVER-MINOR) update OpenSSL build config to support compression (Tim Perry) #62217
doc:
* (SEMVER-MINOR) update `blockList` stability status to release candidate (alphaleadership) #63050
fs:
* (SEMVER-MINOR) support caller-supplied readFile() buffers (Matteo Collina) #63634
http:
* (SEMVER-MINOR) close pre-request sockets in closeIdleConnections (semimikoh) #63470
loader:
* (SEMVER-MINOR) implement package maps (Maël Nison) #62239
net:
* (SEMVER-MINOR) support TCP_KEEPINTVL and TCP_KEEPCNT in setKeepAlive (Guy Bedford) #63825
tls:
* (SEMVER-MINOR) add certificateCompression option (Tim Perry) #62217
vfs:
* (SEMVER-MINOR) dispatch fs/promises to mounted VFS instances (Matteo Collina) #63537
* (SEMVER-MINOR) add minimal node:vfs subsystem (Matteo Collina) #63115
PR-URL: #64058
aduh95 added a commit that referenced this pull request Jun 23, 2026
@aduh95
2026-06-24, Version 26.4.0 (Current)
2022edf
Notable changes:
deps:
* (SEMVER-MINOR) update OpenSSL build config to support compression (Tim Perry) #62217
doc:
* (SEMVER-MINOR) update `blockList` stability status to release candidate (alphaleadership) #63050
fs:
* (SEMVER-MINOR) support caller-supplied `readFile()` buffers (Matteo Collina) #63634
http:
* (SEMVER-MINOR) close pre-request sockets in `closeIdleConnections` (semimikoh) #63470
loader:
* (SEMVER-MINOR) implement package maps (Maël Nison) #62239
net:
* (SEMVER-MINOR) support `TCP_KEEPINTVL` and `TCP_KEEPCNT` in `setKeepAlive` (Guy Bedford) #63825
tls:
* (SEMVER-MINOR) add `certificateCompression` option (Tim Perry) #62217
vfs:
* (SEMVER-MINOR) dispatch `node:fs/promises` to mounted VFS instances (Matteo Collina) #63537
* (SEMVER-MINOR) add minimal `node:vfs` subsystem (Matteo Collina) #63115
PR-URL: #64058
aduh95 added a commit that referenced this pull request Jun 24, 2026
@aduh95
2026-06-24, Version 26.4.0 (Current)
cc37ad5
Notable changes:
deps:
* (SEMVER-MINOR) update OpenSSL build config to support compression (Tim Perry) #62217
doc:
* (SEMVER-MINOR) update `blockList` stability status to release candidate (alphaleadership) #63050
fs:
* (SEMVER-MINOR) support caller-supplied `readFile()` buffers (Matteo Collina) #63634
http:
* (SEMVER-MINOR) close pre-request sockets in `closeIdleConnections` (semimikoh) #63470
loader:
* (SEMVER-MINOR) implement package maps (Maël Nison) #62239
net:
* (SEMVER-MINOR) support `TCP_KEEPINTVL` and `TCP_KEEPCNT` in `setKeepAlive` (Guy Bedford) #63825
tls:
* (SEMVER-MINOR) add `certificateCompression` option (Tim Perry) #62217
vfs:
* (SEMVER-MINOR) dispatch `node:fs/promises` to mounted VFS instances (Matteo Collina) #63537
* (SEMVER-MINOR) add minimal `node:vfs` subsystem (Matteo Collina) #63115
PR-URL: #64058
@mcollinamcollina mentioned this pull request Jul 2, 2026
Open
This was referenced Jul 27, 2026
Closed
Closed
jylenhof pushed a commit to jylenhof/mise-update-tool that referenced this pull request Aug 4, 2026
@github-actions@jylenhof
chore(mise): upgrade local tools
edf69b4
Automated mise tool upgrades from local config.
Updated tools:
- `action-validator`
- `actionlint`
- `aube`
- `editorconfig-checker`
- `ghalint`
- `node`
- `pinact`
- `pipx:gh-action-pulse`
- `prek`
- `rumdl`
- `shellcheck`
- `shfmt`
- `tombi`
- `uv`
- `yamlfmt`
- `yamllint`
- `zizmor`
Command: `mise upgrade --bump --local action-validator actionlint aube editorconfig-checker ghalint node pinact pipx:gh-action-pulse prek rumdl shellcheck shfmt tombi uv yamlfmt yamllint zizmor`
<details>
<summary>Version changelog (node)</summary>
| Tool | Requested | Installed |
|------|-----------|-----------|
| `node` | `24` → `26` | `24.18.1` → `26.5.1` |
</details>
<details>
<summary>Release notes (1 tools)</summary>
<details>
<summary>node: `24.18.1` → `26.5.1` (nodejs/node)</summary>
### v25.8.2
This is a security release.
### Notable Changes
* (CVE-2026-21637) wrap `SNICallback` invocation in `try`/`catch` (Matteo Collina) - High
* (CVE-2026-21710) use null prototype for `headersDistinct`/`trailersDistinct` (Matteo Collina) - High
* (CVE-2026-21711) include permission check to `pipe_wrap.cc` (RafaelGSS) - Medium
* (CVE-2026-21712) handle url crash on different url formats (RafaelGSS) - Medium
* (CVE-2026-21713) use timing-safe comparison in Web Cryptography HMAC and KMAC (Filip Skokan) - Medium
* (CVE-2026-21714) handle `NGHTTP2_ERR_FLOW_CONTROL` error code (RafaelGSS) - Medium
* (CVE-2026-21717) test array index hash collision (Joyee Cheung) - Medium
* (CVE-2026-21715) add permission check to `realpath.native` (RafaelGSS) - Low
* (CVE-2026-21716) include permission check on `lib/fs/promises` (RafaelGSS) - Low
### Commits
* \[[`2086b7477b`](nodejs/node@2086b7477b)] - **(CVE-2026-21717)** **build,test**: test array index hash collision (Joyee Cheung) [nodejs-private/node-private#834](https://github.com/nodejs-private/node-private/pull/834)
* \[[`0f9332a40a`](nodejs/node@0f9332a40a)] - **(CVE-2026-21713)** **crypto**: use timing-safe comparison in Web Cryptography HMAC and KMAC (Filip Skokan) [nodejs-private/node-private#822](https://github.com/nodejs-private/node-private/pull/822)
* \[[`2b6937ddb2`](nodejs/node@2b6937ddb2)] - **deps**: update undici to 7.24.4 (Node.js GitHub Bot) [#62271](nodejs/node#62271)
* \[[`bfb8ad5787`](nodejs/node@bfb8ad5787)] - **deps**: update undici to 7.24.3 (Node.js GitHub Bot) [#62233](nodejs/node#62233)
* \[[`be6384727f`](nodejs/node@be6384727f)] - **deps**: upgrade npm to 11.11.1 (npm team) [#62216](nodejs/node#62216)
* \[[`2feea5bb97`](nodejs/node@2feea5bb97)] - **deps**: V8: override… (truncated)
### v25.9.0
### Notable Changes
#### Test runner module mocking improvements
`MockModuleOptions.defaultExport` and `MockModuleOptions.namedExports` have been
consolidated into a single option `MockModuleOptions.exports` to align with user
expectations and other test runners.
A `default` property on `MockModuleOptions.exports` represents the default
export, and own enumerable properties are treated as named exports.
An automated migration is available to update user code:
<https://github.com/nodejs/userland-migrations/tree/main/recipes/mock-module-exports>
```bash
npx codemod @​nodejs/mock-module-exports
```
Contributed by sangwook in [#61727](nodejs/node#61727).
#### Other notable changes
* \[[`312476cb84`](nodejs/node@312476cb84)] - **(SEMVER-MINOR)** **async\_hooks**: add using scopes to `AsyncLocalStorage` (Stephen Belanger) [#61674](nodejs/node#61674)
* \[[`62d2cd473b`](nodejs/node@62d2cd473b)] - **(SEMVER-MINOR)** **cli**: add `--max-heap-size` option (tannal) [#58708](nodejs/node#58708)
* \[[`d0ebf0e44b`](nodejs/node@d0ebf0e44b)] - **(SEMVER-MINOR)** **crypto**: add `TurboSHAKE` and `KangarooTwelve` Web Cryptography algorithms (Filip Skokan) [#62183](nodejs/node#62183)
* \[[`f85b9d9fa8`](nodejs/node@f85b9d9fa8)] - **(SEMVER-MINOR)** **repl**: add customizable error handling (Anna Henningsen) [#62188](nodejs/node#62188)
* \[[`67b854d407`](nodejs/node@67b854d407)] - **(SEMVER-MINOR)** **repl**: remove dependency on `node:domain` (Matteo Collina) [#61227](nodejs/node#61227)
* \[[`966b700623`](nodejs/node@966b700623)] - **(SEMVER-MINOR)** **sea**: support code cache for ESM entrypoint in SEA (Joyee Cheung) [#62158](nodejs/node#62158)
*… (truncated)
### v26.0.0
We're excited to announce the release of Node.js 26! Highlights include the Temporal API enabled by default,
updates to the V8 JavaScript engine to 14.6, Undici to 8.0, and several important deprecations and removals
as we continue to modernize the platform.
As a reminder, Node.js 26 will enter long-term support (LTS) in October, but until then, it will be the "Current" release for the next six months.
We encourage you to explore the new features and benefits offered by this latest release and evaluate their potential impact on your applications.
### Notable Changes
#### Temporal API
The Temporal API is now enabled by default in Node.js 26. Temporal is a modern date/time API for JavaScript
that provides a more robust and feature-rich alternative to the legacy `Date` object.
Contributed by Richard Lau in [#61806](nodejs/node#61806).
#### V8 14.6
The V8 engine is updated to version 14.6.202.33, which is part of Chromium 134.
This version also includes:
* Upsert (<https://github.com/tc39/proposal-upsert>): `[Weak]Map.prototype.getOrInsert()`, `[Weak]Map.prototype.getOrInsertComputed()`
* Iterator sequencing (<https://github.com/tc39/proposal-iterator-sequencing>): `Iterator.concat()`
Contributed by Michaël Zasso in [#61898](nodejs/node#61898).
#### Undici 8
Undici has been updated to version 8.0.2, bringing new features and improvements to Node.js's HTTP client implementation.
#### Deprecations and Removals
* \[[`dff46c07c3`](nodejs/node@dff46c07c3)] - **(SEMVER-MAJOR)** **crypto**: move DEP0182 to End-of-Life (Tobias Nießen) [#61084](nodejs/node#61084)
* \[[`93c25815ee`](nodejs/node@93c25815ee)] - **(SEMVER-MAJOR)** **http**: move writeHeader to end-of-life (Sebastian Beltran) [#60635](nodejs/node#60635)
`http.Server.prototype.writeHeader()` is now fully removed. Use `http.Server.prototype.write… (truncated)
### v26.1.0
### Notable Changes
#### Experimental `node:ffi` module
Node.js now includes an experimental `node:ffi` module for loading dynamic
libraries and calling native symbols from JavaScript.
The API is gated behind the `--experimental-ffi` flag and, when the Permission
Model is enabled, requires `--allow-ffi`.
This API is inherently unsafe. Invalid pointers, incorrect signatures, or accessing memory
after it has been freed can crash the process or corrupt memory.
Contributed by Paolo Insogna in [#62072](nodejs/node#62072).
#### Other Notable Changes
* \[[`34a6454fe3`](nodejs/node@34a6454fe3)] - **(SEMVER-MINOR)** **buffer**: add `end` parameter (Robert Nagy) [#62390](nodejs/node#62390)
* \[[`073e84d7fe`](nodejs/node@073e84d7fe)] - **(SEMVER-MINOR)** **crypto**: accept key data in `crypto.diffieHellman()` and cleanup DH jobs (Filip Skokan) [#62527](nodejs/node#62527)
* \[[`5b9cb10a5f`](nodejs/node@5b9cb10a5f)] - **(SEMVER-MINOR)** **crypto**: implement `randomUUIDv7()` (nabeel378) [#62553](nodejs/node#62553)
* \[[`98f9becd16`](nodejs/node@98f9becd16)] - **(SEMVER-MINOR)** **debugger**: add edit-free runtime expression probes to `node inspect` (Joyee Cheung) [#62713](nodejs/node#62713)
* \[[`06defaa2ea`](nodejs/node@06defaa2ea)] - **(SEMVER-MINOR)** **fs**: add `signal` option to `fs.stat()` (Mert Can Altin) [#57775](nodejs/node#57775)
* \[[`db66a963bf`](nodejs/node@db66a963bf)] - **(SEMVER-MINOR)** **fs**: expose `frsize` field in `statfs` (Jinho Jang) [#62277](nodejs/node#62277)
* \[[`87adb3472b`](nodejs/node@87adb3472b)] - **(SEMVER-MINOR)** **http**: harden `ClientRequest` options merge (Matteo Collina) [#6… (truncated)
### v26.2.0
### Notable Changes
* \[[`189d43a193`](nodejs/node@189d43a193)] - **doc**: mark `stream.compose` stable (Matteo Collina) [#62562](nodejs/node#62562)
* \[[`f858c6140e`](nodejs/node@f858c6140e)] - **(SEMVER-MINOR)** **fs**: add `Temporal.Instant` support to `Stats` and `BigIntStats` (Livia Medeiros) [#60789](nodejs/node#60789)
* \[[`0cbb3895df`](nodejs/node@0cbb3895df)] - **(SEMVER-MINOR)** **http**: add `writeInformation` to send arbitrary 1xx status codes (Tim Perry) [#63155](nodejs/node#63155)
### Commits
* \[[`9a394bab84`](nodejs/node@9a394bab84)] - **benchmark**: respect stream/iter broadcast backpressure (Trivikram Kamat) [#63314](nodejs/node#63314)
* \[[`ad98b4620b`](nodejs/node@ad98b4620b)] - **crypto**: align verifyOneShot accepted types (Anshika Jain) [#63280](nodejs/node#63280)
* \[[`ba0736a847`](nodejs/node@ba0736a847)] - **crypto**: wire ML-DSA and ML-KEM for use when using BoringSSL (Filip Skokan) [#63255](nodejs/node#63255)
* \[[`5573a6a4a8`](nodejs/node@5573a6a4a8)] - **crypto**: wire ChaCha20-Poly1305 in Web Cryptography when using BoringSSL (Filip Skokan) [#63255](nodejs/node#63255)
* \[[`7dc563b8d6`](nodejs/node@7dc563b8d6)] - **crypto**: wire AES-KW in Web Cryptography when using BoringSSL (Filip Skokan) [#63255](nodejs/node#63255)
* \[[`b55e2b1f4d`](nodejs/node@b55e2b1f4d)] - **crypto**: improve system certificate enumeration logic on macOS (Robo) [#62576](nodejs/node#62576)
* \[[`fd509a755a`](nodejs/node@fd509a755a)] - **crypto**: harden CryptoKey algorithm slots… (truncated)
### v26.3.0
### Notable Changes
#### Potential changes to macOS Universal Binary availability
With Apple and its ecosystem progressively dropping support for Intel-based
architectures, it has become apparent that the Node.js project may not be able
to maintain the universal binaries we currently distribute for the full lifetime
of Node.js 26. This change serves to communicate that risk. At present, our
intention remains to continue shipping universal binaries supporting both Apple
Silicon and Intel-based Macs for as long as practical.
Contributed by Antoine du Hamel in [#63055](nodejs/node#63055).
#### Other notable changes
* \[[`a2a4b33dd8`](nodejs/node@a2a4b33dd8)] - **(SEMVER-MINOR)** **buffer**: increase `Buffer.poolSize` default to 64 KiB (Matteo Collina) [#63597](nodejs/node#63597)
* \[[`051a2152f7`](nodejs/node@051a2152f7)] - **crypto**: update root certificates to NSS 3.123.1 (Node.js GitHub Bot) [#63527](nodejs/node#63527)
* \[[`49462eca37`](nodejs/node@49462eca37)] - **(SEMVER-MINOR)** **http**: add `httpValidation` option to configure header value validation (RajeshKumar11) [#61597](nodejs/node#61597)
* \[[`97b7ab19bd`](nodejs/node@97b7ab19bd)] - **(SEMVER-MINOR)** **inspector**: expose precise coverage start to JS runtime (sangwook) [#63079](nodejs/node#63079)
* \[[`cfb80a2103`](nodejs/node@cfb80a2103)] - **(SEMVER-MINOR)** **lib,permission**: add `permission.drop` (Rafael Gonzaga) [#62672](nodejs/node#62672)
### Commits
* \[[`a2a4b33dd8`](nodejs/node@a2a4b33dd8)] - **(SEMVER-MINOR)** **buffer**: increase Buffer.poolSize default to 64 KiB (Matteo Collina) [#63597](nodejs/node#63597)
* \[[`0eff3e23b9`](https://github.com/nodejs/n… (truncated)
### v26.3.1
This is a security release.
### Notable Changes
* (CVE-2026-48618) tls: normalize hostname for server identity checks (Matteo Collina) – High
* (CVE-2026-48933) crypto: guard WebCrypto cipher output length (Filip Skokan) – High
* (CVE-2026-48615) lib,test: redact proxy credentials in tunnel errors (Matteo Collina) – Medium
* (CVE-2026-48619) http2: cap originSet size to prevent unbounded memory growth (Matteo Collina) – Medium
* (CVE-2026-48928) tls: fix case-sensitive SNI context matching (Matteo Collina) – Medium
* (CVE-2026-48930) dns,net: reject hostnames with embedded NUL bytes (Matteo Collina) – Medium
* (CVE-2026-48934) tls: bind reusable sessions to authenticated host (Matteo Collina) – Medium
* (CVE-2026-48617) permission: handle process.chdir on writereport (RafaelGSS) – Low
* (CVE-2026-48931) http: fix response queue poisoning in http.Agent (Matteo Collina) – Low
* (CVE-2026-48935) permission: disable FileHandle utimes with permission model (RafaelGSS) – Low
* (CVE-2026-48936) permission: guard pipe open and chmod with net scope (RafaelGSS) – Low
### Commits
* \[[`98fbc89211`](nodejs/node@98fbc89211)] - **(CVE-2026-48933)** **crypto**: guard WebCrypto cipher output length (Filip Skokan) [nodejs-private/node-private#878](https://github.com/nodejs-private/node-private/pull/878)
* \[[`110840f2c7`](nodejs/node@110840f2c7)] - **deps**: update llhttp to 9.4.2 (Antoine du Hamel) [nodejs-private/node-private#890](https://github.com/nodejs-private/node-private/pull/890)
* \[[`8d36d522b2`](nodejs/node@8d36d522b2)] - **deps**: update undici to 8.5.0 (Node.js GitHub Bot) [#63903](nodejs/node#63903)
* \[[`2e6d03993a`](nodejs/node@2e6d03993a)] - **deps**: update undici to 8.4.0 (Node.js GitHub Bot) [#63779](nodejs/node#63779)
* \[[`5a17d5b07a`](nodejs/node@5a17d5b07a)] - **deps… (truncated)
### v26.4.0
### Notable Changes
* \[[`cde0daabcc`](nodejs/node@cde0daabcc)] - **(SEMVER-MINOR)** **doc**: update `blockList` stability status to release candidate (alphaleadership) [#63050](nodejs/node#63050)
* \[[`b78f5a7537`](nodejs/node@b78f5a7537)] - **(SEMVER-MINOR)** **fs**: support caller-supplied `readFile()` buffers (Matteo Collina) [#63634](nodejs/node#63634)
* \[[`417aacbc36`](nodejs/node@417aacbc36)] - **(SEMVER-MINOR)** **http**: close pre-request sockets in `closeIdleConnections` (semimikoh) [#63470](nodejs/node#63470)
* \[[`fbb108be7d`](nodejs/node@fbb108be7d)] - **(SEMVER-MINOR)** **loader**: implement package maps (Maël Nison) [#62239](nodejs/node#62239)
* \[[`45494d5a8a`](nodejs/node@45494d5a8a)] - **(SEMVER-MINOR)** **net**: support `TCP_KEEPINTVL` and `TCP_KEEPCNT` in `setKeepAlive` (Guy Bedford) [#63825](nodejs/node#63825)
* \[[`ee29465e77`](nodejs/node@ee29465e77)] - **(SEMVER-MINOR)** **tls**: add certificateCompression option (Tim Perry) [#62217](nodejs/node#62217)
* \[[`b17817eb2b`](nodejs/node@b17817eb2b)] - **(SEMVER-MINOR)** **vfs**: dispatch `node:fs/promises` to mounted VFS instances (Matteo Collina) [#63537](nodejs/node#63537)
* \[[`7bc93a6ac5`](nodejs/node@7bc93a6ac5)] - **(SEMVER-MINOR)** **vfs**: add minimal `node:vfs` subsystem (Matteo Collina) [#63115](nodejs/node#63115)
### Commits
* \[[`c7eb83b46a`](nodejs/node@c7eb83b46a)] - **benchmark**: add child\_process async path baselines (Yagiz Nizipli) [#63929](nodejs/node#63929)
* \[[`066fff17a5`](https://github.com/nodejs/node/commit/066f… (truncated)
### v26.5.0
### Notable Changes
#### New release key
Welcome to our newest releaser, [Stewart X Addison](https://github.com/sxa). Future Node.js releases may be signed with his [release key](https://github.com/nodejs/node/blob/main/README.md#release-keys), `655F3B5C1FB3FA8D1A0CA6BDE4A7D232B936D2FD`.
#### Other notable changes
* \[[`55f48446c7`](nodejs/node@55f48446c7)] - **(SEMVER-MINOR)** **buffer**: implement blob.textStream() (Matthew Aitken) [#64036](nodejs/node#64036)
* \[[`b373202efc`](nodejs/node@b373202efc)] - **(SEMVER-MINOR)** **esm**: add `--experimental-import-text` flag (Efe) [#62300](nodejs/node#62300)
* \[[`39e0c14455`](nodejs/node@39e0c14455)] - **(SEMVER-MINOR)** **perf\_hooks**: sample delay per event loop iteration (Pablo Erhard) [#62935](nodejs/node#62935)
* \[[`999a83c937`](nodejs/node@999a83c937)] - **(SEMVER-MINOR)** **stream**: expose ReadableStreamTee (Matteo Collina) [#64195](nodejs/node#64195)
* \[[`4e0236dc3d`](nodejs/node@4e0236dc3d)] - **(SEMVER-MINOR)** **tls**: report negotiated TLS groups (Filip Skokan) [#64119](nodejs/node#64119)
### Commits
* \[[`87648c0a6c`](nodejs/node@87648c0a6c)] - **benchmark**: trim down the argon2 sets (Filip Skokan) [#64218](nodejs/node#64218)
* \[[`a483bfd3f0`](nodejs/node@a483bfd3f0)] - **buffer**: remove unreachable overflow check in atob (haramjeong) [#60161](nodejs/node#60161)
* \[[`6d14279688`](nodejs/node@6d14279688)] - **buffer**: add fast api for isUtf8 and isAscii (Gürgün Dayıoğlu) [#64169](nodejs/node#64169)
* \[[`55f48446c7`](nodejs/node@55f48446c7)] -… (truncated)
### v26.5.1
This is a security release.
### Notable Changes
* (CVE-2026-56848) http2: defer rst stream while in scope (Matteo Collina) – High
* (CVE-2026-58043) permission: avoid granting radix split nodes (RafaelGSS) – High
* (CVE-2026-56850) https: distinguish PFX object-array agent keys (RafaelGSS) – Medium
* (CVE-2026-58040) https: bind identity checks to session reuse (Matteo Collina) – Medium
* (CVE-2026-58041) sqlite: invalidate tag store iterators on statement reset (Matteo Collina) – Medium
* (CVE-2026-58042) dns: handle large resolveAny address replies (RafaelGSS) – Medium
* (CVE-2026-58045) zlib: throw on out-of-bounds write buffers (RafaelGSS) – Medium
* (CVE-2026-56847) permission: enforce fs write permission for trace events (RafaelGSS) – Low
* (CVE-2026-58039) permission: check final report output path (RafaelGSS) – Low
* (CVE-2026-58044) http: reject requests exceeding max header count (Matteo Collina) – Low
* deps: update llhttp to 9.4.3 (Paolo Insogna)
* deps: update undici to 8.9.0 (Node.js GitHub Bot)
### Commits
* \[[`af0bf96877`](nodejs/node@af0bf96877)] - **deps**: update llhttp to 9.4.3 (Paolo Insogna) [nodejs-private/node-private#935](https://github.com/nodejs-private/node-private/pull/935)
* \[[`0354678355`](nodejs/node@0354678355)] - **deps**: update undici to 8.9.0 (Node.js GitHub Bot) [#64712](nodejs/node#64712)
* \[[`dbeeaeec13`](nodejs/node@dbeeaeec13)] - **(CVE-2026-58042)** **dns**: handle large resolveAny address replies (RafaelGSS) [nodejs-private/node-private#929](https://github.com/nodejs-private/node-private/pull/929)
* \[[`064d339f56`](nodejs/node@064d339f56)] - **(CVE-2026-58044)** **http**: reject requests exceeding max header count (Matteo Collina) [nodejs-private/node-private#922](https://github.com/nodejs-private/node-private/pull/922)
* \[[`23b94c843a`](https://github.… (truncated)
_Omitted 12 older releases._
</details>
</details>
Modified files:
- `.mise.toml`
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