CVE-2026-21716 in Node.jsinfo

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.

Responsible

hackerone

Reservation

01/04/2026

Disclosure

03/30/2026

Entries

VulDB provides additional information and datapoints for this CVE:

ID	Vulnerability	CWE	Exp	Cou	CVE
354281	Node.js Promises API FileHandle.chown file descriptor consumption	769	Not defined	Official fix	CVE-2026-21716

Description

CPE

CWE

CVSS

Exploits

History

Diff

Relate

Threat Intelligence

API JSON

API XML

API CSV

◂ PreviousOverviewNext ▸

Are you interested in using VulDB?

Download the whitepaper to learn more about our service!