GHSA-9qj4-v6r6-3wmxHighCVSS 7.5

Apache ActiveMQ Broker, Apache ActiveMQ, Apache ActiveMQ All have a Denial of Service via Out of Memory vulnerability

Published
June 30, 2026
Last Modified
November 4, 2026

🔗 CVE IDs covered (1)

📋 Description

Denial of Service via Out of Memory vulnerability in Apache ActiveMQ Broker, Apache ActiveMQ, Apache ActiveMQ All.

Following the fix for CVE-2026-49270 an unauthenticated attacker can now cause broker OOM by sending an repeated BrokerInfo commands without sending a ConnectionInfo, until the broker will crash with OOM. This issue affects Apache ActiveMQ Broker: from 5.19.7 before 5.19.8, from 6.2.6 before 6.2.7; Apache ActiveMQ: from 5.19.7 before 5.19.8, from 6.2.6 before 6.2.7; Apache ActiveMQ All: from 5.19.7 before 5.19.8, from 6.2.6 before 6.2.7.

Users are recommended to upgrade to version 6.2.7, which fixes the issue.

🎯 Affected products6

  • maven/org.apache.activemq:activemq-broker:= 5.19.7
  • maven/org.apache.activemq:activemq-broker:= 6.2.6
  • maven/org.apache.activemq:apache-activemq:= 5.19.7
  • maven/org.apache.activemq:apache-activemq:= 6.2.6
  • maven/org.apache.activemq:activemq-all:= 5.19.7
  • maven/org.apache.activemq:activemq-all:= 6.2.6

🔗 References (9)