{"id":"CVE-2026-40046","aliases":["GHSA-xvqc-pp94-fmpx"],"url":"https://o3.security/vulnerability/CVE-2026-40046","summary":"Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ MQTT: Missing fix for CVE-2025-66168: MQTT control packet remaining length field is not properly validated","details":"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.","published":"2026-04-13T05:36:23.428Z","modified":"2026-04-13T08:27:19.495842350Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Bitnami","name":"activemq","fixedVersion":"6.2.4"}],"fix":null,"references":[{"type":"WEB","url":"https://activemq.apache.org/security-advisories.data/CVE-2026-40046-announcement.txt"},{"type":"WEB","url":"https://lists.apache.org/thread/zdntj5rcgjjzrpow84o339lzldy68zrg"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40046"},{"type":"WEB","url":"https://www.cve.org/CVERecord?id=CVE-2025-66168"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-04-13T08:27:19.495842350Z"}}