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CVE-2026-21716 (GCVE-0-2026-21716)

Vulnerability from cvelistv5 – Published: 2026-03-30 19:07 – Updated: 2026-03-31 14:27
VLAI
Summary
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.
Severity
3.3 (Low)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-31 14:27 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
nodejs node Affected: 20.20.1 , ≤ 20.20.1 (semver)
Affected: 22.22.1 , ≤ 22.22.1 (semver)
Affected: 24.14.0 , ≤ 24.14.0 (semver)
Affected: 25.8.1 , ≤ 25.8.1 (semver)
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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