CVE-2026-21711

MediumCVSS 5.3/10Last modified Aug 19, 2026

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.

Metrics

CVSS 3.0 5.3/10CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Weakness enumeration

CWE-284

Affected software

Vendor	Product	Versions
nodejs	node	>= 25.8.1, <= 25.8.1; >= 4.0, < 4.; >= 5.0, < 5.; >= 6.0, < 6.; >= 7.0, < 7.; >= 8.0, < 8.; >= 9.0, < 9.; >= 10.0, < 10.; >= 11.0, < 11.; >= 12.0, < 12.; >= 13.0, < 13.; >= 14.0, < 14.; >= 15.0, < 15.; >= 16.0, < 16.; >= 17.0, < 17.; >= 18.0, < 18.; >= 19.0, < 19.

References

https://nodejs.org/en/blog/vulnerability/march-2026-security-releasesVendor Advisory

Timeline

Published: Mar 30, 2026
Last modified: Aug 19, 2026
NVD status: Analyzed

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