Medium severity6.5NVD Advisory· Published Apr 29, 2026· Updated May 6, 2026
CVE-2026-42521
CVE-2026-42521
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
org.jenkins-ci.plugins:matrix-authMaven | >= 2.0-beta-1, < 3.2.10 | 3.2.10 |
Affected products
14cpe:2.3:a:jenkins:matrix_authorization_strategy:2.0:beta1:*:*:*:jenkins:*:*+ 3 more
- 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:*:*
- cpe:2.3:a:jenkins:matrix_authorization_strategy:*:*:*:*:*:jenkins:*:*range: >=2.1,<3.2.10
- osv-coords10 versionspkg:apk/chainguard/jenkins-2.541-openjdk-17pkg:apk/chainguard/jenkins-2.541-openjdk-21pkg:apk/chainguard/jenkins-2.555pkg:apk/chainguard/jenkins-2.555-openjdk-21pkg:apk/chainguard/jenkins-2.555-openjdk-25pkg:apk/chainguard/jenkins-2-openjdk-21pkg:apk/chainguard/jenkins-2-openjdk-25pkg:apk/wolfi/jenkins-2-openjdk-21pkg:apk/wolfi/jenkins-2-openjdk-25pkg:maven/org.jenkins-ci.plugins/matrix-auth
< 2.541.3-r8+ 9 more
- (no CPE)range: < 2.541.3-r8
- (no CPE)range: < 2.541.3-r8
- (no CPE)range: < 2.555.2-r0
- (no CPE)range: < 2.555.2-r0
- (no CPE)range: < 2.555.2-r0
- (no CPE)range: < 2.560-r1
- (no CPE)range: < 2.563-r0
- (no CPE)range: < 2.560-r1
- (no CPE)range: < 2.563-r0
- (no CPE)range: >= 2.0-beta-1, < 3.2.10
Patches
Vulnerability mechanics
References
3- github.com/advisories/GHSA-jp9r-mmhw-vff3ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-42521ghsaADVISORY
- www.jenkins.io/security/advisory/2026-04-29/nvdVendor AdvisoryWEB
News mentions
1- Jenkins Security Advisory 2026-04-29Jenkins Security Advisories · Apr 29, 2026