CVE-2026-21715

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.

The following products are affected by CVE-2026-21715 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-21715.

URL	Resource
https://nodejs.org/en/blog/vulnerability/march-2026-security-releases