CVE-2026-42521
Medium
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.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Jenkins Matrix Authorization Strategy
PublishedApr 29, 2026
First seenApr 29, 2026
Weakness typeCWE-502Deserialization of untrusted data
How to fix
Update
- jenkins matrix_authorization_strategy3.2.10 or later
- org.jenkins-ci.plugins:matrix-auth3.2.10 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| jenkins matrix_authorization_strategy | 2.1 ≤ v < 3.2.10, 2.0 | 3.2.10 |
| org.jenkins-ci.plugins:matrix-authMaven | 2.0-beta-1 ≤ v < 3.2.10 | 3.2.10 |
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