Security advisory

{
  "id": "db50ab94bd44b9d71902376f0d69f4eede7bb8867e0a64451e36e7c3061873a6",
  "url": "https://osv.dev/vulnerability/CVE-2026-42521",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-42521",
    "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.",
    "evidence": "osv:CVE-2026-42521",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-42521",
      "aliases": [
        "CVE-2026-42521",
        "GHSA-jp9r-mmhw-vff3"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/jenkinsci/matrix-auth-plugin",
              "type": "GIT",
              "events": [
                {
                  "introduced": "44a577a8208ede02d6d20fe0aa6ba8c2ad7efc7b"
                },
                {
                  "fixed": "b3f7342c0fae5a81afe3e18f86f1633695e8cd82"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:jenkins:matrix_authorization_strategy:*:*:*:*:*:jenkins:*:*",
                    "range": [
                      {
                        "introduced": "2.1"
                      },
                      {
                        "fixed": "3.2.10"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "matrix-auth-3.2.9",
            "matrix-auth-3.2.8",
            "matrix-auth-3.2.7",
            "matrix-auth-3.2.6",
            "matrix-auth-3.2.5",
            "matrix-auth-3.2.4",
            "matrix-auth-3.2.3",
            "matrix-auth-3.2.2",
            "matrix-auth-3.2.1",
            "matrix-auth-3.2",
            "matrix-auth-3.1.10",
            "matrix-auth-3.1.9",
            "matrix-auth-3.1.8",
            "matrix-auth-3.1.7",
            "matrix-auth-3.1.6",
            "matrix-auth-3.1.5",
            "matrix-auth-3.1.4",
            "matrix-auth-3.1.3",
            "matrix-auth-3.1.2",
            "matrix-auth-3.1.1",
            "matrix-auth-3.1",
            "matrix-auth-3.0.1",
            "matrix-auth-3.0",
            "matrix-auth-2.6.11",
            "matrix-auth-2.6.10",
            "matrix-auth-2.6.9",
            "matrix-auth-2.6.8",
            "matrix-auth-2.6.7",
            "matrix-auth-2.6.6",
            "matrix-auth-2.6.5",
            "matrix-auth-2.6.4",
            "matrix-auth-2.6.3",
            "matrix-auth-2.6.2",
            "matrix-auth-2.6.1",
            "matrix-auth-2.6",
            "matrix-auth-2.5",
            "matrix-auth-2.4.2",
            "matrix-auth-2.4.1",
            "matrix-auth-2.4",
            "matrix-auth-2.3",
            "matrix-auth-2.2",
            "matrix-auth-2.1.1",
            "matrix-auth-2.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42521.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:39.073563772Z",
      "provider": "osv",
      "references": [
        "https://www.jenkins.io/security/advisory/2026-04-29/#SECURITY-3676"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:jenkins:matrix_authorization_strategy:2.0:beta1:*:*:*:jenkins:*:*",
              "cpe:2.3:a:jenkins:matrix_authorization_strategy:2.0:beta2:*:*:*:jenkins:*:*",
              "cpe:2.3:a:jenkins:matrix_authorization_strategy:2.0:beta3:*:*:*:jenkins:*:*"
            ],
            "vendor_product": "jenkins:matrix_authorization_strategy",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "2.0-beta1"
                  },
                  {
                    "last_affected": "2.0-beta1"
                  },
                  {
                    "introduced": "2.0-beta2"
                  },
                  {
                    "last_affected": "2.0-beta2"
                  },
                  {
                    "introduced": "2.0-beta3"
                  },
                  {
                    "last_affected": "2.0-beta3"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-42521",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 506754,
  "published_at": "2026-04-29T14:16:19.17+00:00"
}