CVE-2026-42521

medium

Published 2026-04-29 · Modified 2026-05-08

CVSS v3

6.5

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

CVSS v2

—

VIR risk

6.5

Description

Jenkins Matrix Authorization Strategy Plugin: Unsafe deserialization allows invocation of parameterless constructors

Exploit likelihood

75%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

vendor Authored 2026-05-27

Vendor advisory: jenkinsci-cert@googlegroups.com — https://www.jenkins.io/security/advisory/2026-04-29/#SECURITY-3676

Ecosystem	Package	Vulnerable	Fixed
Maven	org.jenkins-ci.plugins:matrix-auth	`>=2.0-beta-1,<3.2.10`	`3.2.10`
MAVEN	org.jenkins-ci.plugins:matrix-auth	`>= 2.0-beta-1, <= 3.2.9`	`3.2.10`

Vendor	Product	Versions	Fixed
jenkins	matrix_authorization_strategy	`{"startIncluding":"2.1","endExcluding":"3.2.10"}`	`3.2.10`
jenkins	matrix_authorization_strategy	`2.0`

CWE-502

Verify integrity in audit chain (admin only). AS-IS.