CVE-2026-42521

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://www.jenkins.io/security/advisory/2026-04-29/#SECURITY-3676	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	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::*

History

06 May 2026, 16:21

Type	Values Removed	Values Added
References	~~() https://www.jenkins.io/security/advisory/2026-04-29/#SECURITY-3676 -~~	() https://www.jenkins.io/security/advisory/2026-04-29/#SECURITY-3676 - Vendor Advisory
CPE		cpe:2.3:a:jenkins:matrix_authorization_strategy:2.0:beta3::::jenkins::* cpe:2.3:a:jenkins:matrix_authorization_strategy:2.0:beta1::::jenkins::* cpe:2.3:a:jenkins:matrix_authorization_strategy::::::jenkins::* cpe:2.3:a:jenkins:matrix_authorization_strategy:2.0:beta2::::jenkins::*
First Time		Jenkins matrix Authorization Strategy Jenkins

30 Apr 2026, 15:11

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-29 14:16

Updated : 2026-06-17 10:47

NVD link : CVE-2026-42521

Mitre link : CVE-2026-42521

CVE.ORG link : CVE-2026-42521

JSON object : View

Products Affected

jenkins

matrix_authorization_strategy

CWE

CWE-502

Deserialization of Untrusted Data

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