GitHub Advisoryadvisory · Maven
GHSA-jp9r-mmhw-vff3 Jenkins Matrix Authorization Strategy Plugin: Unsafe deserialization allows invocation of parameterless constructors
MEDIUM
Official page ↗
- Aliases
- CVE-2026-42521
- Ecosystem
- Maven
- Packages
- org.jenkins-ci.plugins:matrix-auth
- Severity
- Moderate
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- Weaknesses
- CWE-502
- Reviewed
- 2026-05-06
Affected packages
• Maven org.jenkins-ci.plugins:matrix-auth: >= 2.0-beta-1, < 3.2.10 → fixed in 3.2.10
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.
This can be abused by 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.
Matrix Authorization Strategy Plugin 3.2.10 verifies that the class being instantiated is an inheritance strategy implementation, preventing instantiation of arbitrary types.
Related
Alias · CVE (1)
- CVE-2026-42521 Jenkins Matrix Authorization Strategy Plugin 2.0-beta-1 through 3.2.9 (both inclusive) invokes parameterless constructors of classes… vulnerability
Weakness · CWE (1)
- CWE-502 Deserialization of Untrusted Data weakness