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CVE-2026-39304 Apache ActiveMQ Client, Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ: Incorrect handling of TLSv1.3 KeyUpdate can be exploited to cause DoS via OOM

🗓️ 10 Apr 2026 10:54:04Reported by apacheType 
cvelist
 cvelist
🔗 www.cve.org👁 28 Views

DoS via TLSv1.3 KeyUpdate exhaustion in ActiveMQ client and broker; upgrade to 6.2.4 or 5.19.5.

Related
Affected
Refs
[
  {
    "collectionURL": "https://repo.maven.apache.org/maven2",
    "defaultStatus": "unaffected",
    "packageName": "org.apache.activemq:activemq-client",
    "product": "Apache ActiveMQ Client",
    "vendor": "Apache Software Foundation",
    "versions": [
      {
        "lessThan": "5.19.4",
        "status": "affected",
        "version": "0",
        "versionType": "semver"
      },
      {
        "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-broker",
    "product": "Apache ActiveMQ Broker",
    "vendor": "Apache Software Foundation",
    "versions": [
      {
        "lessThan": "5.19.4",
        "status": "affected",
        "version": "0",
        "versionType": "semver"
      },
      {
        "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": "5.19.4",
        "status": "affected",
        "version": "0",
        "versionType": "semver"
      },
      {
        "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:apache-activemq",
    "product": "Apache ActiveMQ",
    "vendor": "Apache Software Foundation",
    "versions": [
      {
        "lessThan": "5.19.4",
        "status": "affected",
        "version": "0",
        "versionType": "semver"
      },
      {
        "lessThan": "6.2.4",
        "status": "affected",
        "version": "6.0.0",
        "versionType": "semver"
      }
    ]
  }
]

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