Vulnerability in Nodejs Node
CVE-2026-21711
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.
EPSS: 0.001 (4.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Nodejs Node — versions 25.8.1, 4.0, 5.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-21711?
- CVE-2026-21711 is a medium-severity vulnerability in Nodejs Node, classified under Improper Access Control. CVSS score: 5.3/10. Published 2026-03-30.
- How severe is CVE-2026-21711?
- Medium severity. CVSS v3 base score is 5.3 out of 10.