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Servers and applications

CVE-2026-21711

Node.js Permission Model bypass: UDS server bind/listen works without `--allow-net`

Severity
Medium 5.3
Published
24 Mar 2026
Last changed
19 Aug 2026
Added to UpHeron
21 Oct 2026
Fixed in
20.0.0, 25.8.2
Sources
NVD, nodejs

Description

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…

Affected software

SoftwareAffected versions
Node.jsServers and applications · cpe:a:nodejs:node.js
  • Every version before 20.0.0
  • From 25.0.0 before 25.8.2
  • From 25.0.0 up to 25.8.1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-21711
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-21711
  • Node.js security release https://nodejs.org/en/blog/vulnerability/march-2026-security-releases