CVE-2026-21711

State: Published
Severity: 5.3 Medium
Published: Mar 30, 2026
Updated: Apr 1, 2026
Reserved: Jan 4, 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.

Scores

CVSS	Score	Vector	Source
3.0	5.3 Medium	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L	hackerone

Weaknesses

CWE-284 Improper Access Control

Affected Products

Product	Versions
nodenodejs	25.8.1 through 25.8.1Affected 4.0 to before 4.Affected 5.0 to before 5.Affected 6.0 to before 6.Affected 7.0 to before 7.Affected 8.0 to before 8.Affected 9.0 to before 9.Affected 10.0 to before 10.Affected 11.0 to before 11.Affected 12.0 to before 12.Affected 13.0 to before 13.Affected 14.0 to before 14.Affected 15.0 to before 15.Affected 16.0 to before 16.Affected 17.0 to before 17.Affected 18.0 to before 18.Affected 19.0 to before 19.Affected

Product

Versions

nodenodejs

25.8.1 through 25.8.1Affected
4.0 to before 4.*Affected
5.0 to before 5.*Affected
6.0 to before 6.*Affected
7.0 to before 7.*Affected
8.0 to before 8.*Affected
9.0 to before 9.*Affected
10.0 to before 10.*Affected
11.0 to before 11.*Affected
12.0 to before 12.*Affected
13.0 to before 13.*Affected
14.0 to before 14.*Affected
15.0 to before 15.*Affected
16.0 to before 16.*Affected
17.0 to before 17.*Affected
18.0 to before 18.*Affected
19.0 to before 19.*Affected

References

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

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.