CVE-2026-42521 Affecting jenkins-2 package, versions <2.563-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published8 May 2026
- disclosed29 Apr 2026
Introduced: 29 Apr 2026
CVE-2026-42521 (opens in a new tab)How to fix?
Upgrade Wolfi jenkins-2 to version 2.563-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream jenkins-2 package and not the jenkins-2 package as distributed by Wolfi.
See How to fix? for Wolfi relevant fixed versions and status.
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.