CVE-2026-71253

{
  "id": "CVE-2026-71253",
  "sourceIdentifier": "[email protected]",
  "published": "2026-10-19T11:17:18.540",
  "lastModified": "2026-10-20T20:17:24.763",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Apache Johnzon.\n\n\n\nClassConverter loads & 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."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Apache Software Foundation",
          "product": "Apache Johnzon",
          "defaultStatus": "unaffected",
          "collectionURL": "https://repo.maven.apache.org/maven2",
          "packageName": "org.apache.johnzon:johnzon-mapper",
          "packageURL": "pkg:maven/org.apache.johnzon/johnzon-mapper",
          "versions": [
            {
              "version": "2.0.0",
              "lessThan": "2.2.0",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "1.0.0",
              "lessThan": "1.3.1",
              "versionType": "semver",
              "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:N/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-10-20T19:34:08.742206Z",
          "id": "CVE-2026-71253",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-470"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/apache/johnzon/commit/91e7b0d21d08d138944e2570691939739422a3d6",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/apache/johnzon/commit/dd3d00634c746a2173a2518e882e85e8a151bf30",
      "source": "[email protected]"
    },
    {
      "url": "https://lists.apache.org/thread.html/3vgm1yo2sn9yhkvvs9lc4ro01vl3zt68",
      "source": "[email protected]"
    }
  ]
}