{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "2.0.0"
                  },
                  {
                    "fixed": "2.2.0"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              },
              {
                "range": [
                  {
                    "introduced": "1.0.0"
                  },
                  {
                    "fixed": "1.3.1"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              },
              {
                "range": [
                  {
                    "fixed": "dd3d00634c746a2173a2518e882e85e8a151bf30"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              },
              {
                "range": [
                  {
                    "fixed": "91e7b0d21d08d138944e2570691939739422a3d6"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              }
            ]
          },
          "events": [
            {
              "introduced": "3845e13be4d7e345a5df33cba82b2de87a07ca44"
            },
            {
              "fixed": "5c6edd556f054818527c019ba95416ae55af2373"
            },
            {
              "introduced": "75120baa250f8538f4c03ed67fa43583db25eadb"
            },
            {
              "fixed": "c29c977c41944c03c8b2eef576122717096ce79a"
            },
            {
              "fixed": "dd3d00634c746a2173a2518e882e85e8a151bf30"
            },
            {
              "fixed": "91e7b0d21d08d138944e2570691939739422a3d6"
            }
          ],
          "repo": "https://github.com/apache/johnzon",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "apache",
    "cwe_ids": [
      "CWE-470"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71253.json"
  },
  "details": "Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Apache Johnzon.\n\n\n\nClassConverter loads \u0026 static-initializes an attacker-named class from untrusted JSON.\n\n\n\n\nThis issue affects Apache Johnzon: from 1.0.0 before 2.2.0.\n\n\n\nUsers are recommended to upgrade to version 1.3.1 (javax namespace) or 2.2.0 (jakarta specification namespace), which fixes the issue.",
  "id": "CVE-2026-71253",
  "modified": "2026-10-21T10:30:54.659994106Z",
  "published": "2026-10-19T10:36:41.781Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71253.json"
    },
    {
      "type": "FIX",
      "url": "https://github.com/apache/johnzon/commit/91e7b0d21d08d138944e2570691939739422a3d6"
    },
    {
      "type": "FIX",
      "url": "https://github.com/apache/johnzon/commit/dd3d00634c746a2173a2518e882e85e8a151bf30"
    },
    {
      "type": "ADVISORY",
      "url": "https://lists.apache.org/thread.html/3vgm1yo2sn9yhkvvs9lc4ro01vl3zt68"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-71253"
    },
    {
      "type": "WEB",
      "url": "https://repo.maven.apache.org/maven2"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Apache Johnzon: ClassConverter loads \u0026 static-initializes an attacker-named class from untrusted JSON"
}