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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

References

Timeline

  1. Published
  2. Last modified

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