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
- nodejs.org nodejs.org
Timeline
- Published
- Last modified
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