Skip to main content
← All vulnerabilities
CVE-2026-40046GHSA-XVQC-PP94-FMPXBIT-ACTIVEMQ-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

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 6.2.4
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: yes
  • Technical impact: partial

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: yes · Technical impact: partial

  3. Record last updated

Affected versions

  • org.apache.activemq:apache-activemq

    From 6.0.0 · fixed in 6.2.4

  • org.apache.activemq:activemq-all

    From 6.0.0 · fixed in 6.2.4

  • org.apache.activemq:activemq-mqtt

    From 6.0.0 · fixed in 6.2.4

  • org.apache.activemq:apache-activemqMaven

    From 6.0.0 · fixed in 6.2.4

  • org.apache.activemq:activemq-allMaven

    From 6.0.0 · fixed in 6.2.4

  • org.apache.activemq:activemq-mqttMaven

    From 6.0.0 · fixed in 6.2.4

References 3

cve.org

activemq.apache.org

lists.apache.org