CVE-2026-42521

{
  "id": "CVE-2026-42521",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-29T14:16:19.170",
  "lastModified": "2026-10-26T20:10:00.160",
  "vulnStatus": "Analyzed",
  "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."
    },
    {
      "lang": "es",
      "value": "El plugin Jenkins Matrix Authorization Strategy 2.0-beta-1 hasta 3.2.9 (ambos inclusive) invoca constructores sin parámetros de clases especificadas en la configuración al deserializar estrategias de herencia, sin restringir las clases que pueden ser instanciadas, permitiendo a atacantes con permiso Item/Configure instanciar tipos arbitrarios, lo que puede llevar a revelación de información u otros impactos dependiendo de las clases disponibles en el classpath."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Jenkins Project",
          "product": "Jenkins Matrix Authorization Strategy Plugin",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "2.0-beta-1",
              "lessThanOrEqual": "3.2.9",
              "versionType": "maven",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-29T13:58:15.842577Z",
          "id": "CVE-2026-42521",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-502"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:jenkins:matrix_authorization_strategy:*:*:*:*:*:jenkins:*:*",
              "versionStartIncluding": "2.1",
              "versionEndExcluding": "3.2.10",
              "matchCriteriaId": "E3A25BA3-0771-4973-A265-27CCD8973FD5"
            },
            {
              "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"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://www.jenkins.io/security/advisory/2026-04-29/#SECURITY-3676",
      "source": "[email protected]",
      "tags": [
        "Vendor Advisory"
      ]
    }
  ]
}