CVE-2026-42521_CVE-2026-42521

6.5 / 10

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

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.

Basic Information

ID CVE-2026-42521

Source jenkins

Published Apr 29, 2026 at 13:31

Modified Apr 29, 2026 at 13:58

Affected Product

Vendor Jenkins Project

Product Jenkins Matrix Authorization Strategy Plugin

Version 2.0-beta-1

Affected Versions Jenkins Project Jenkins Matrix Authorization Strategy Plugin 2.0-beta-1

CWE Classification

CWE-502

References

www.jenkins.io /security/advisory/2026-04-29/

{
    "lastseen": "",
    "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.",
    "published": "2026-04-29T13:31:30.608Z",
    "modified": "2026-04-29T13:58:20.768Z",
    "type": "cve",
    "title": "CVE-2026-42521",
    "source": "jenkins",
    "references": "https://www.jenkins.io/security/advisory/2026-04-29/#SECURITY-3676",
    "id": "CVE-2026-42521",
    "bulletinFamily": "",
    "cwe": [
        "CWE-502"
    ],
    "cvelist": null,
    "sourceData": "Jenkins Project Jenkins Matrix Authorization Strategy Plugin 2.0-beta-1",
    "sourceHref": "",
    "cvss": {
        "score": 6.5,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Jenkins Matrix Authorization Strategy Plugin",
    "version": "2.0-beta-1",
    "vendor": "Jenkins Project",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}