EUVD-2026-17180
CVSS Vector
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Lifecycle Timeline
5Description
An incomplete fix for CVE-2024-36137 leaves `FileHandle.chmod()` and `FileHandle.chown()` in the promises API without the required permission checks, while their callback-based equivalents (`fs.fchmod()`, `fs.fchown()`) were correctly patched. As a result, code running under `--permission` with restricted `--allow-fs-write` can still use promise-based `FileHandle` methods to modify file permissions and ownership on already-open file descriptors, bypassing the intended write restrictions. This vulnerability affects **20.x, 22.x, 24.x, and 25.x** processes using the Permission Model where `--allow-fs-write` is intentionally restricted.
Analysis
Node.js Permission Model bypass in FileHandle.chmod() and FileHandle.chown() promise-based methods allows local authenticated users with restricted --allow-fs-write to modify file permissions and ownership on already-open file descriptors, circumventing intended write restrictions. The vulnerability affects Node.js 20.x, 22.x, 24.x, and 25.x when running under the --permission flag; the callback-based equivalents (fs.fchmod, fs.fchown) were correctly patched in CVE-2024-36137, but the promises API was incompletely fixed. …
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Priority Score
Vendor Status
Ubuntu
Priority: Medium| Release | Status | Version |
|---|---|---|
| trusty | needs-triage | - |
| xenial | needs-triage | - |
| bionic | needs-triage | - |
| focal | needs-triage | - |
| jammy | needs-triage | - |
| noble | needs-triage | - |
| questing | needs-triage | - |
| upstream | released | 22.22.2+dfsg+~cs22.19.15-1 |
Debian
| Release | Status | Fixed Version | Urgency |
|---|---|---|---|
| bullseye | vulnerable | 12.22.12~dfsg-1~deb11u4 | - |
| bullseye (security) | vulnerable | 12.22.12~dfsg-1~deb11u7 | - |
| bookworm, bookworm (security) | vulnerable | 18.20.4+dfsg-1~deb12u1 | - |
| trixie | fixed | 20.19.2+dfsg-1+deb13u2 | - |
| trixie (security) | fixed | 20.19.2+dfsg-1+deb13u2 | - |
| forky | vulnerable | 22.22.1+dfsg+~cs22.19.15-1 | - |
| sid | fixed | 22.22.2+dfsg+~cs22.19.15-1 | - |
| (unstable) | fixed | 22.22.2+dfsg+~cs22.19.15-1 | - |
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External POC / Exploit Code
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