# CVE-2026-42521

> Vulnerability · severity: **MEDIUM** (CVSS 6.5).

## 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.

## Key facts

- **CVE ID:** CVE-2026-42521
- **Published:** 2026-04-29
- **CVSS severity:** MEDIUM
- **CVSS base score:** 6.5
- **CWE codes:** CWE-502

## Affected products

- `jenkins:matrix_authorization_strategy`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-42521

## Citation

> AI Analytics. CVE-2026-42521. Retrieved 2026-08-08 from https://api.ai-analytics.org/cve/CVE-2026-42521. Derived from NIST NVD. Licensed CC0.

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