What’s Vulnerable › Vulnerabilities
CVE-2026-42521
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-04-29 · updated 2026-10-26
- Weakness: CWE-502
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 products
- Jenkins project Jenkins Matrix Authorization Strategy Plugin: from 2.1 before 3.2.10; 2.0-beta1, 2.0-beta2, 2.0-beta3 — fixed in 3.2.10
How to fix
Upgrade to a fixed version: Jenkins project Jenkins Matrix Authorization Strategy Plugin 3.2.10. Check the vendor advisory for mitigations.
References
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