{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-40046", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "state": "PUBLISHED", "assignerShortName": "apache", "dateReserved": "2026-04-08T15:21:53.253Z", "datePublished": "2026-04-09T15:58:32.966Z", "dateUpdated": "2026-04-09T15:58:32.966Z"}, "containers": {"cna": {"affected": [{"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"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Adrien Bernard"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>\n\n</p><p>Integer Overflow or Wraparound vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ MQTT.</p>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.<br><p>\n\n<span style=\"background-color: rgb(255, 255, 255);\">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.</span>\n\n</p><p>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.</p><p></p>"}], "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."}], "metrics": [{"other": {"content": {"text": "moderate"}, "type": "Textual description of severity"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-190", "description": "CWE-190 Integer Overflow or Wraparound", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-04-09T15:58:32.966Z"}, "references": [{"tags": ["related"], "url": "https://www.cve.org/CVERecord?id=CVE-2025-66168"}, {"tags": ["vendor-advisory"], "url": "https://activemq.apache.org/security-advisories.data/CVE-2026-40046-announcement.txt"}, {"tags": ["vendor-advisory"], "url": "https://lists.apache.org/thread/zdntj5rcgjjzrpow84o339lzldy68zrg"}], "source": {"discovery": "UNKNOWN"}, "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", "x_generator": {"engine": "Vulnogram 0.2.0"}}}}

{}

{"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."}], "id": "CVE-2026-40046", "lastModified": "2026-04-09T17:16:31.650", "metrics": {}, "published": "2026-04-09T17:16:31.650", "references": [{"source": "security@apache.org", "url": "https://activemq.apache.org/security-advisories.data/CVE-2026-40046-announcement.txt"}, {"source": "security@apache.org", "url": "https://lists.apache.org/thread/zdntj5rcgjjzrpow84o339lzldy68zrg"}, {"source": "security@apache.org", "url": "https://www.cve.org/CVERecord?id=CVE-2025-66168"}], "sourceIdentifier": "security@apache.org", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-190"}], "source": "security@apache.org", "type": "Primary"}]}

{}

{}