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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

CVSS 7.5 HIGHEPSS 0.4%CWE-190
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Produtos afetados
Apache Software Foundation · Apache ActiveMQApache Software Foundation · Apache ActiveMQ AllApache Software Foundation · Apache ActiveMQ MQTT

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Referências
https://activemq.apache.org/security-advisories.data/CVE-2026-40046-announcement.txthttps://lists.apache.org/thread/zdntj5rcgjjzrpow84o339lzldy68zrghttps://www.cve.org/CVERecord?id=CVE-2025-66168