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3.3 Low

CVE-2026-106073 A flaw in Node.js Permission Model filesystem enforcement leaves `fs.realpathSync()` without the required read…

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**.

Affected products and versions

Product Affected versions Fixed in
Node 26.12.0 No fix stated
Node 24.22.0 No fix stated
Node 22.23.3 No fix stated

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