Node.js 25.x Permission Model Bypass Exploiting UDS
CVE-2026-21711 Published on March 30, 2026
A flaw in Node.js Permission Model network enforcement leaves Unix Domain Socket (UDS) server operations without the required permission checks, while all comparable network paths correctly enforce them. As a result, code running under `--permission` without `--allow-net` can create and expose local IPC endpoints, allowing communication with other processes on the same host outside of the intended network restriction boundary. This vulnerability affects Node.js **25.x** processes using the Permission Model where `--allow-net` is intentionally omitted to restrict network access. Note that `--allow-net` is currently an experimental feature.
Weakness Type
What is an Authorization Vulnerability?
The software does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
CVE-2026-21711 has been classified to as an Authorization vulnerability or weakness.
Affected Versions
nodejs node:- Version 25.8.1, <= 25.8.1 is affected.
- Version 4.0 and below 4.* is affected.
- Version 5.0 and below 5.* is affected.
- Version 6.0 and below 6.* is affected.
- Version 7.0 and below 7.* is affected.
- Version 8.0 and below 8.* is affected.
- Version 9.0 and below 9.* is affected.
- Version 10.0 and below 10.* is affected.
- Version 11.0 and below 11.* is affected.
- Version 12.0 and below 12.* is affected.
- Version 13.0 and below 13.* is affected.
- Version 14.0 and below 14.* is affected.
- Version 15.0 and below 15.* is affected.
- Version 16.0 and below 16.* is affected.
- Version 17.0 and below 17.* is affected.
- Version 18.0 and below 18.* is affected.
- Version 19.0 and below 19.* is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.