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5.8 Medium

CVE-2026-21636 A flaw in Node.js's permission model allows Unix Domain Socket (UDS) connections to bypass network restrictions when…

Description

A flaw in Node.js's permission model allows Unix Domain Socket (UDS) connections to bypass network restrictions when `--permission` is enabled. Even without `--allow-net`, attacker-controlled inputs (such as URLs or socketPath options) can connect to arbitrary local sockets via net, tls, or undici/fetch. This breaks the intended security boundary of the permission model and enables access to privileged local services, potentially leading to privilege escalation, data exposure, or local code execution. * The issue affects users of the Node.js permission model on version v25. In the moment of this vulnerability, network permissions (`--allow-net`) are still in the experimental phase.

Affected products and versions

Product Affected versions Fixed in
Node 25.2.1 No fix stated

References

Timeline

  1. Published
  2. Last modified

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