CVE-2026-42521: Jenkins Matrix Authorization Strategy

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

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 products

• Jenkins Matrix Authorization Strategy: from 2.1, before 3.2.10 (fixed in 3.2.10); version 2.0 only

Published 2026-04-29. Last modified 2026-06-17.