PT-2026-35915 · Jenkins · Matrix Authorization Strategy Plugin

Arafat Ul Islam + 1 · Published 2026-04-29 · Updated 2026-04-29 · CVE-2026-42521

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Name of the Vulnerable Software and Affected Versions Jenkins Matrix Authorization Strategy Plugin versions 2.0-beta-1 through 3.2.9

Description The plugin invokes parameterless constructors of classes specified in the configuration during the deserialization of inheritance strategies. Because it does not restrict the classes that can be instantiated, users with Item/Configure permission can instantiate arbitrary types. This may result in information disclosure or other impacts depending on the classes available on the classpath.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Deserialization of Untrusted Data

Weakness Enumeration

CWE-502

Related Identifiers

CVE-2026-42521

GHSA-JP9R-MMHW-VFF3

Affected Products

Matrix Authorization Strategy Plugin

References · 5

• https://jenkins.io/security/advisory/2026-04-29/#SECURITY-3676 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-jp9r-mmhw-vff3 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-42521 · Security Note
• https://github.com/jenkinsci/matrix-auth-plugin · Note
• https://twitter.com/CVEnew/status/2049594355736891566 · Twitter Post