FKIE_CVE-2026-42521

Vulnerability from fkie_nvd - Published: 2026-04-29 14:16 - Updated: 2026-06-17 10:47
Severity
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Summary
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.
References
jenkinsci-cert@googlegroups.comhttps://www.jenkins.io/security/advisory/2026-04-29/#SECURITY-3676Vendor Advisory
Impacted products
Vendor Product Version
jenkins matrix_authorization_strategy *
jenkins matrix_authorization_strategy 2.0
jenkins matrix_authorization_strategy 2.0
jenkins matrix_authorization_strategy 2.0
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Jenkins Matrix Authorization Strategy Plugin",
          "vendor": "Jenkins Project",
          "versions": [
            {
              "lessThanOrEqual": "3.2.9",
              "status": "affected",
              "version": "2.0-beta-1",
              "versionType": "maven"
            }
          ]
        }
      ],
      "source": "jenkinsci-cert@googlegroups.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:jenkins:matrix_authorization_strategy:*:*:*:*:*:jenkins:*:*",
              "matchCriteriaId": "E3A25BA3-0771-4973-A265-27CCD8973FD5",
              "versionEndExcluding": "3.2.10",
              "versionStartIncluding": "2.1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:jenkins:matrix_authorization_strategy:2.0:beta1:*:*:*:jenkins:*:*",
              "matchCriteriaId": "5BE52D85-98B6-42EF-8817-A0039B61406A",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:jenkins:matrix_authorization_strategy:2.0:beta2:*:*:*:jenkins:*:*",
              "matchCriteriaId": "55E2BB1C-F686-46E0-8D12-A0C70DF2CC91",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:jenkins:matrix_authorization_strategy:2.0:beta3:*:*:*:jenkins:*:*",
              "matchCriteriaId": "B5E7F6EB-50E0-4A3B-A481-45BD14714558",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    }
  ],
  "id": "CVE-2026-42521",
  "lastModified": "2026-06-17T10:47:58.917",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-42521",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-04-29T13:58:15.842577Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-04-29T14:16:19.170",
  "references": [
    {
      "source": "jenkinsci-cert@googlegroups.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.jenkins.io/security/advisory/2026-04-29/#SECURITY-3676"
    }
  ],
  "sourceIdentifier": "jenkinsci-cert@googlegroups.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-502"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}



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