CVE-2026-21711

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 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.

How to fix CVE-2026-21711

To remediate CVE-2026-21711, upgrade the affected package to a fixed version below.

• —upgrade to 25.8.2 or later
• —upgrade to 25.8.2 or later

Is CVE-2026-21711 being exploited?

Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• >= 25.0.0, < 25.8.2
• >= 25.0.0, < 25.8.2

CVSS scores

References (2)

• WEBnodejs.org/en/blog/vulnerability/march-2026-security-releases
• WEBnvd.nist.gov/vuln/detail/CVE-2026-21711