CVE-2026-21716

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 v3 3.3 LOW

3.3^/10

CVSS v3 : LOW

Vector : AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Exploitability : 1.8 / Impact : 1.4

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://nodejs.org/en/blog/vulnerability/march-2026-security-releases	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:nodejs:node.js:::::-:::*
	cpe:2.3:a:nodejs:node.js:::::-:::*
	cpe:2.3:a:nodejs:node.js:::::-:::*
	cpe:2.3:a:nodejs:node.js:::::-:::*

History

No history.

Information

Published : 2026-03-30 20:16

Updated : 2026-08-19 13:18

NVD link : CVE-2026-21716

Mitre link : CVE-2026-21716

CVE.ORG link : CVE-2026-21716

JSON object : View

Products Affected

nodejs

node.js

CWE

CWE-862

Missing Authorization

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