CVE-2026-42521

Published: Apr 29, 2026Modified: Jun 17, 2026

6.5

Vector

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

Exploitability: 2.8 / Impact: 3.6

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Description

Jenkins Matrix Authorization Strategy Plugin 2.0-beta-1 through 3.2.9 (both inclusive) invokes parameterless constructors of classes specified in configuration when deserializing inheritance strategies, without restricting the classes that can be instantiated, allowing attackers with Item/Configure permission to instantiate arbitrary types, which may lead to information disclosure or other impacts depending on the classes available on the classpath.

Affected (4)

Products: Jenkins: Matrix Authorization Strategy

Jenkins

1 product

Matrix Authorization Strategy

Configuration A

4 vulnerable

Vulnerable Software	Affected Versions
Jenkins Matrix Authorization Strategy	From 2.1 to 3.2.10
Jenkins Matrix Authorization Strategy	Version 2.0 beta1
Jenkins Matrix Authorization Strategy	Version 2.0 beta2
Jenkins Matrix Authorization Strategy	Version 2.0 beta3

Related CWEs

CWE-502

Deserialization of Untrusted Data

The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid.

References (1)

https://www.jenkins.io/security/advisory/2026-04-29/#SECURITY-3676

Source: jenkinsci-cert@googlegroups.com

Vendor Advisory

Timeline

No history available yet.