CVE-2026-42521: Vulnerability in Jenkins Project Jenkins Matrix Authorization Strategy Plugin
A vulnerability exists in Jenkins Matrix Authorization Strategy Plugin versions 2. 0-beta-1 through 3. 2. 9. The plugin deserializes inheritance strategies by invoking parameterless constructors of classes specified in configuration without restricting which classes can be instantiated. This allows attackers with Item/Configure permission to instantiate arbitrary types, potentially leading to information disclosure or other impacts depending on the classes available on the classpath. No official patch or remediation guidance is currently provided. There are no known exploits in the wild at this time.
AI Analysis
Technical Summary
The Jenkins Matrix Authorization Strategy Plugin (versions 2.0-beta-1 through 3.2.9) contains a deserialization vulnerability where it invokes parameterless constructors of classes specified in configuration without restricting the classes that can be instantiated. This flaw allows an attacker with Item/Configure permission to instantiate arbitrary classes during deserialization, which may lead to information disclosure or other impacts depending on the environment and available classes on the classpath.
Potential Impact
An attacker with Item/Configure permission can exploit this vulnerability to instantiate arbitrary classes during deserialization, which may result in information disclosure or other impacts. The exact impact depends on the classes available on the classpath and the environment in which Jenkins is running. There are no reports of known exploits in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict Item/Configure permissions to trusted users only to reduce the risk of exploitation.
CVE-2026-42521: Vulnerability in Jenkins Project Jenkins Matrix Authorization Strategy Plugin
Description
A vulnerability exists in Jenkins Matrix Authorization Strategy Plugin versions 2. 0-beta-1 through 3. 2. 9. The plugin deserializes inheritance strategies by invoking parameterless constructors of classes specified in configuration without restricting which classes can be instantiated. This allows attackers with Item/Configure permission to instantiate arbitrary types, potentially leading to information disclosure or other impacts depending on the classes available on the classpath. No official patch or remediation guidance is currently provided. There are no known exploits in the wild at this time.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Jenkins Matrix Authorization Strategy Plugin (versions 2.0-beta-1 through 3.2.9) contains a deserialization vulnerability where it invokes parameterless constructors of classes specified in configuration without restricting the classes that can be instantiated. This flaw allows an attacker with Item/Configure permission to instantiate arbitrary classes during deserialization, which may lead to information disclosure or other impacts depending on the environment and available classes on the classpath.
Potential Impact
An attacker with Item/Configure permission can exploit this vulnerability to instantiate arbitrary classes during deserialization, which may result in information disclosure or other impacts. The exact impact depends on the classes available on the classpath and the environment in which Jenkins is running. There are no reports of known exploits in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict Item/Configure permissions to trusted users only to reduce the risk of exploitation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- jenkins
- Date Reserved
- 2026-04-28T09:24:35.048Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69f20cdfcbff5d8610181a84
Added to database: 4/29/2026, 1:51:27 PM
Last enriched: 4/29/2026, 2:06:55 PM
Last updated: 4/29/2026, 4:32:41 PM
Views: 6
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