CVE-2026-42521

Published Apr 29, 2026 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-jp9r-mmhw-vff3 Jenkins Matrix Authorization Strategy Plugin: Unsafe deserialization allows invocation of parameterless constructors
History
Type Values Removed Values Added
First Time appeared Jenkins
Jenkins matrix Authorization Strategy
CPEs cpe:2.3:a:jenkins:matrix_authorization_strategy:*:*:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:matrix_authorization_strategy:2.0:beta1:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:matrix_authorization_strategy:2.0:beta2:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:matrix_authorization_strategy:2.0:beta3:*:*:*:jenkins:*:*
Vendors & Products Jenkins
Jenkins matrix Authorization Strategy
Type Values Removed Values Added
First Time appeared Jenkins Project
Jenkins Project jenkins Matrix Authorization Strategy Plugin
Vendors & Products Jenkins Project
Jenkins Project jenkins Matrix Authorization Strategy Plugin
Type Values Removed Values Added
Weaknesses CWE-502
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
jenkins
Published
Updated
Apr 29, 2026, 1:58 PM
Reserved
Apr 28, 2026, 9:24 AM
Status
Analyzed
Published
Apr 29, 2026, 2:16 PM
Modified
Oct 26, 2026, 8:10 PM