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CVE-2026-40046 Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ MQTT: Missing fix for CVE-2025-66168: MQTT control packet remaining length field is not properly validated

🗓️ 09 Apr 2026 15:58:32Reported by apacheType 
cvelist
 cvelist
🔗 www.cve.org👁 16 Views

ActiveMQ and MQTT vulnerable before 6.2.4; upgrade to 6.2.4 or 5.19.x for CVE-2025-66168.

Related
Affected
Refs
[
  {
    "collectionURL": "https://repo.maven.apache.org/maven2",
    "defaultStatus": "unaffected",
    "packageName": "org.apache.activemq:apache-activemq",
    "product": "Apache ActiveMQ",
    "vendor": "Apache Software Foundation",
    "versions": [
      {
        "lessThan": "6.2.4",
        "status": "affected",
        "version": "6.0.0",
        "versionType": "semver"
      }
    ]
  },
  {
    "collectionURL": "https://repo.maven.apache.org/maven2",
    "defaultStatus": "unaffected",
    "packageName": "org.apache.activemq:activemq-all",
    "product": "Apache ActiveMQ All",
    "vendor": "Apache Software Foundation",
    "versions": [
      {
        "lessThan": "6.2.4",
        "status": "affected",
        "version": "6.0.0",
        "versionType": "semver"
      }
    ]
  },
  {
    "collectionURL": "https://repo.maven.apache.org/maven2",
    "defaultStatus": "unaffected",
    "packageName": "org.apache.activemq:activemq-mqtt",
    "product": "Apache ActiveMQ MQTT",
    "vendor": "Apache Software Foundation",
    "versions": [
      {
        "lessThan": "6.2.4",
        "status": "affected",
        "version": "6.0.0",
        "versionType": "semver"
      }
    ]
  }
]

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