CVE-2026-21636
A flaw in Node.js's permission model allows Unix Domain Socket (UDS) connections to bypass network restrictions when `--permission` is enabled. Even w...
Original description
The description as published by the source.
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 packages
Bitnami
node
[{"type":"SEMVER","events":[{"introduced":"25.0.0"},{"fixed":"25.3.0"}]}]
Bitnami
node-min
[{"type":"SEMVER","events":[{"introduced":"25.0.0"},{"fixed":"25.3.0"}]}]
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Ubuntu UBUNTU-CVE-2026-21636 nodejs
References
- advisory nvd.nist.gov
- advisory github.com
- web nodejs.org