PT-2026-35915 · Jenkins · Jenkins Matrix Authorization Strategy Plugin

Published 2026-04-29 · Updated 2026-04-29 · CVE-2026-42521

Mitre

CVSS v3.1

6.5

Medium

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

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.

Fix

Deserialization of Untrusted Data

Weakness Enumeration

CWE-502

Related Identifiers

CVE-2026-42521

Affected Products

Jenkins Matrix Authorization Strategy Plugin

References · 2

• https://jenkins.io/security/advisory/2026-04-29/#SECURITY-3676 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-42521 · Security Note