CVE-2026-21715_CVE-2026-21715

3.3 / 10

LOW

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

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.

Basic Information

ID CVE-2026-21715

Source hackerone

Published Mar 30, 2026 at 19:07

Modified Apr 1, 2026 at 15:02

Affected Product

Vendor nodejs

Product node

Version 20.20.1

Affected Versions nodejs node 20.20.1
nodejs node 22.22.1
nodejs node 24.14.0
nodejs node 25.8.1
nodejs node 4.0
nodejs node 5.0
nodejs node 6.0
nodejs node 7.0
nodejs node 8.0
nodejs node 9.0
nodejs node 10.0
nodejs node 11.0
nodejs node 12.0
nodejs node 13.0
nodejs node 14.0
nodejs node 15.0
nodejs node 16.0
nodejs node 17.0
nodejs node 18.0
nodejs node 19.0

CWE Classification

CWE-732

References

nodejs.org /en/blog/vulnerability/march-2026-security-releases

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