CVE-2026-21715 - Node.js Permission Model fs.realpathSync.native() Permission Bypass

CVE-2026-21715 - Node.js Permission Model fs.realpathSync.native() Permission Bypass

https://cvefeed.io/rssfeed/latest.atom / Tue, 03/31/2026 - 00:09
CVE ID :CVE-2026-21715
Published : March 30, 2026, 8:16 p.m. | 49 minutes ago
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.
Severity: 3.3 | LOW
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