CVE-2026-106073

Low

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**.

SeverityLow

CVSS3.3

Exploit probability—

ProductNode

PublishedOct 23, 2026

First seenOct 23, 2026

Weakness typeCWE-284Improper access control

How to fix

Sources list no fixed version or patch link for this vulnerability.

Affected products

Product	Affected versions	Fixed in
nodejs node	22.23.3, 24.22.0, 26.12.0	—

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