Improper access control in Node.js - CVE-2026-48936
Published: June 22, 2026
Vulnerability identifier: #VU135024
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-48936
CWE-ID: CWE-284
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to bypass network permission restrictions.
The vulnerability exists due to improper access control in the Permission API when starting a local server over a Unix domain socket without --allow-net permission. A local user can start a local server over a Unix domain socket to bypass network permission restrictions.
This issue is described as an incomplete fix for CVE-2026-21636.
Affected software
Node.js
How to mitigate CVE-2026-48936
Install security update from vendor's website.
Node.js - addressed in versions 22.23.0, 24.17.0, 26.3.1