VULNERABILITY INTELLIGENCE

CVE-2026-21715

CVSS score3.3 LOW
EPSS probability0.15%
CISA KEVNot currently listed
Published2026-03-30
Last modified2026-08-19
CVSS vectorCVSS: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.

Weakness classification

  • 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-732

Primary references