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    3 vulnerabilities found for Apache ActiveMQ MQTT by Apache Software Foundation

    JVNDB-2026-006408

    Vulnerability from jvndb - Published: 2026-04-24 17:56 - Updated:2026-04-24 17:56
    Severity
    5.4 (Medium) - cvssV3_0 - CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
    Summary
    Apache ActiveMQ series improper validation of MQTT packets [AMQ-9810]
    Details
    Apache ActiveMQ series provided by The Apache Software Foundation does not properly validate the remaining length field of MQTT packets, which may lead to integer overflow and misinterpretation of MQTT packets.
    • Integer overflow or wraparound (CWE-190) - CVE-2025-66168, CVE-2026-40046
    Gai Tanaka of Mitsui Bussan Secure Directions, Inc. reported this vulnerability in version 6.2.0 to the developer and IPA under Information Security Early Warning Partnership. JPCERT/CC coordinated with the developer to publish the advisory.
    References
    Impacted products
    Show details on JVN DB website
    To clipboard 

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  "@rdf:about": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-006408.html",
  "dc:date": "2026-04-24T17:56+09:00",
  "dcterms:issued": "2026-04-24T17:56+09:00",
  "dcterms:modified": "2026-04-24T17:56+09:00",
  "description": "Apache ActiveMQ series provided by The Apache Software Foundation does not properly validate the remaining length field of MQTT packets, which may lead to integer overflow and misinterpretation of MQTT packets.\u003ca href=\u0027https://cwe.mitre.org/data/definitions/190.html\u0027 target=\u0027_blank\u0027\u003e\u003c/a\u003e\u003cul\u003e\u003cli\u003eInteger overflow or wraparound (CWE-190) - CVE-2025-66168, CVE-2026-40046\u003c/li\u003e\u003c/ul\u003eGai Tanaka of Mitsui Bussan Secure Directions, Inc. reported this vulnerability in version 6.2.0 to the developer and IPA under Information Security Early Warning Partnership.\r\nJPCERT/CC coordinated with the developer to publish the advisory.",
  "link": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-006408.html",
  "sec:cpe": [
    {
      "#text": "cpe:/a:apache:activemq",
      "@product": "Apache ActiveMQ",
      "@vendor": "Apache Software Foundation",
      "@version": "2.2"
    },
    {
      "#text": "cpe:/a:apache:activemq_mqtt",
      "@product": "Apache ActiveMQ MQTT",
      "@vendor": "Apache Software Foundation",
      "@version": "2.2"
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  "sec:cvss": {
    "@score": "5.4",
    "@severity": "Medium",
    "@type": "Base",
    "@vector": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
    "@version": "3.0"
  },
  "sec:identifier": "JVNDB-2026-006408",
  "sec:references": [
    {
      "#text": "https://jvn.jp/en/jp/JVN20669184/index.html",
      "@id": "JVN#20669184",
      "@source": "JVN"
    },
    {
      "#text": "https://www.cve.org/CVERecord?id=CVE-2025-66168",
      "@id": "CVE-2025-66168",
      "@source": "CVE"
    },
    {
      "#text": "https://www.cve.org/CVERecord?id=CVE-2026-40046",
      "@id": "CVE-2026-40046",
      "@source": "CVE"
    },
    {
      "#text": "https://nvd.nist.gov/vuln/detail/CVE-2025-66168",
      "@id": "CVE-2025-66168",
      "@source": "NVD"
    },
    {
      "#text": "https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html",
      "@id": "CWE-Other",
      "@title": "No Mapping(CWE-Other)"
    }
  ],
  "title": "Apache ActiveMQ series improper validation of MQTT packets [AMQ-9810]"
}

    CVE-2026-40046 (GCVE-0-2026-40046)

    Vulnerability from nvd – Published: 2026-04-09 15:58 – Updated: 2026-04-10 19:41
    VLAI
    Title
    Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ MQTT: Missing fix for CVE-2025-66168: MQTT control packet remaining length field is not properly validated
    Summary
    Integer Overflow or Wraparound vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ MQTT. The 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. This 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. Users 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.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    Assigner
    References
    Impacted products
    Credits
    Adrien Bernard
    Show details on NVD website
    To clipboard 

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    CVE-2026-40046 (GCVE-0-2026-40046)

    Vulnerability from cvelistv5 – Published: 2026-04-09 15:58 – Updated: 2026-04-10 19:41
    VLAI
    Title
    Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ MQTT: Missing fix for CVE-2025-66168: MQTT control packet remaining length field is not properly validated
    Summary
    Integer Overflow or Wraparound vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ MQTT. The 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. This 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. Users 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.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    Assigner
    References
    Impacted products
    Credits
    Adrien Bernard
    Show details on NVD website
    To clipboard 

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