CVE-2026-21715

LowCVSS 3.3/10Last modified Aug 19, 2026

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.

Metrics

CVSS 3.0 3.3/10CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Weakness enumeration

CWE-732

Affected software

No affected versions have been published.

Timeline

Published: Mar 30, 2026
Last modified: Aug 19, 2026
NVD status: Analyzed

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