ALPINE-CVE-2026-21716

Advisory lineage Upstream: 1 Downstream: 0
Upstream
CVE-2026-21716
Published: 30 Mar 2026, 20:16
Last modified:15 Jun 2026, 18:18

Vulnerability Summary

Overall Risk (default)
low
13/100
CVSS Score
3.3 LOW
3.0 (osv_alpine)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

30 Mar 2026, 20:16
Published
Vulnerability first disclosed
15 Jun 2026, 18:18
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.0•LOW•Score: 3.3CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Affected Systems

  • alpine•nodejs

    < 22.22.2-r0 | < 22.22.2-r0 | < 24.14.1-r0 | < 24.14.1-r0

References (1)