CVE-2026-40046

{
  "id": "CVE-2026-40046",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-09T17:16:31.650",
  "lastModified": "2026-10-26T00:10:00.150",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Integer Overflow or Wraparound vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ MQTT.\n\nThe fix for \"CVE-2025-66168: MQTT control packet remaining length field is not properly validated\" was only applied to 5.19.2 (and future 5.19.x) releases but was missed for all 6.0.0+ versions.\n\n\nThis issue affects Apache ActiveMQ: from 6.0.0 before 6.2.4; Apache ActiveMQ All: from 6.0.0 before 6.2.4; Apache ActiveMQ MQTT: from 6.0.0 before 6.2.4.\n\n\n\nUsers are recommended to upgrade to version 6.2.4 or a 5.19.x version starting with 5.19.2 or later (currently latest is 5.19.5), which fixes the issue."
    },
    {
      "lang": "es",
      "value": "Desbordamiento de entero o desbordamiento circular vulnerabilidad en Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ MQTT.\n\nLa solución para ’CVE-2025-66168: el campo de longitud restante del paquete de control MQTT no se valida correctamente’ solo se aplicó a las versiones 5.19.2 (y futuras 5.19.x) pero se omitió para todas las versiones 6.0.0+.\n\nEste problema afecta a Apache ActiveMQ: desde 6.0.0 antes de 6.2.4; Apache ActiveMQ All: desde 6.0.0 antes de 6.2.4; Apache ActiveMQ MQTT: desde 6.0.0 antes de 6.2.4.\n\nSe recomienda a los usuarios actualizar a la versión 6.2.4 o a una versión 5.19.x a partir de 5.19.2 o posterior (actualmente la última es 5.19.5), lo que soluciona el problema."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Apache Software Foundation",
          "product": "Apache ActiveMQ",
          "defaultStatus": "unaffected",
          "collectionURL": "https://repo.maven.apache.org/maven2",
          "packageName": "org.apache.activemq:apache-activemq",
          "versions": [
            {
              "version": "6.0.0",
              "lessThan": "6.2.4",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Apache Software Foundation",
          "product": "Apache ActiveMQ All",
          "defaultStatus": "unaffected",
          "collectionURL": "https://repo.maven.apache.org/maven2",
          "packageName": "org.apache.activemq:activemq-all",
          "versions": [
            {
              "version": "6.0.0",
              "lessThan": "6.2.4",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Apache Software Foundation",
          "product": "Apache ActiveMQ MQTT",
          "defaultStatus": "unaffected",
          "collectionURL": "https://repo.maven.apache.org/maven2",
          "packageName": "org.apache.activemq:activemq-mqtt",
          "versions": [
            {
              "version": "6.0.0",
              "lessThan": "6.2.4",
              "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:N/I:N/A:H",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-10T19:39:38.679321Z",
          "id": "CVE-2026-40046",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-190"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://activemq.apache.org/security-advisories.data/CVE-2026-40046-announcement.txt",
      "source": "[email protected]"
    },
    {
      "url": "https://lists.apache.org/thread/zdntj5rcgjjzrpow84o339lzldy68zrg",
      "source": "[email protected]"
    },
    {
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-66168",
      "source": "[email protected]"
    }
  ]
}