---
id: CVE-2026-106073
title: >-
  A flaw in Node.js Permission Model filesystem enforcement leaves
  `fs.realpathSync()` without the required read permission checks
summary: >-
  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, c…
severity: low
cvss: 3.3
cvssVector: 'CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-284
vendor: nodejs
product: node
affected:
  - node >= 22.23.3 <= 22.23.3
  - node >= 24.22.0 <= 24.22.0
  - node >= 26.12.0 <= 26.12.0
published: '2026-10-23'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T16:15:05.728Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-106073'
references:
  - url: 'https://nodejs.org/en/blog/vulnerability/october-2026-security-releases'
tags:
  - cve.org
ingestedAt: '2026-10-23T16:31:11.320Z'
---

## Overview

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

- `node >= 22.23.3 <= 22.23.3`
- `node >= 24.22.0 <= 24.22.0`
- `node >= 26.12.0 <= 26.12.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.