🛡️ CVE-2026-21715 on Debian — nodejs

⚪ Unknown ✅ No Known Exploit OSV

N/A

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

A flaw in Node.js Permission Model filesystem enforcement leaves fs.realpathSync.native() without the required read permission checks, while all comparable filesystem functions correctly enforce them. As a result, code running under --permission with restricted --allow-fs-read can still use fs.realpathSync.native() to check file existence, resolve symlink targets, and enumerate filesystem paths outside of permitted directories. This vulnerability affects 20.x, 22.x, 24.x, and 25.x processes using the Permission Model where --allow-fs-read is intentionally restricted.

Distribution advisory

This page covers CVE-2026-21715 as tracked by Debian, for the package nodejs. The fix is available in version 22.22.2+dfsg+~cs22.19.15-1; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity none, availability none.

Affected software

DEBIAN-CVE-2026-21715 is recorded against 1 package.

nodejs (fixed in 22.22.2+dfsg+~cs22.19.15-1)

Timeline and source

Published on 30 March 2026 and last revised on 20 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

security-tracker.debian.org (Advisory)

CVE-2026-21715 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Alpine BellSoft Base record Ubuntu

Details

Severity Unknown

CVSS Score N/A

CVSS Vector CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CWE N/A

Public Exploit ✅ No

Source OSV

Published 2026-03-30

Updated 2026-08-20

Modified 2026-08-20

Fix URL N/A

Affected Packages

Software	From version	Fixed in
nodejs	—	22.22.2+dfsg+~cs22.19.15-1

References

ADVISORY https://security-tracker.debian.org/tracker/CVE-2026-21715

🔗 NVD 🔗 Mitre

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