CVE-2026-106073

State: Published
Severity: 3.3 Low
Published: Oct 23, 2026
Updated: Oct 23, 2026
Reserved: Oct 6, 2026

Description

A flaw in Node.js Permission Model filesystem enforcement leaves `fs.realpathSync()` without the required read permission checks. This is an incomplete fix of CVE-2026-21715, which only covered `fs.realpathSync.native()`.

As a result, code running under `--permission` with restricted `--allow-fs-read` can still use `fs.realpathSync()` to check file existence, resolve symlink targets, and enumerate filesystem paths outside of permitted directories.

This vulnerability affects Node.js **26.x**, **24.x**, and **22.x**.

Scores

CVSS	Score	Vector	Source
3.0	3.3 Low	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N	hackerone

Weaknesses

CWE-284 Improper Access Control - Generic

Affected Products

Product	Versions
nodenodejs	22.23.3 through 22.23.3Affected 24.22.0 through 24.22.0Affected 26.12.0 through 26.12.0Affected

References

https://nodejs.org/en/blog/vulnerability/october-2026-security-releases

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