High [CVE-2026-49270 +1] Apache ActiveMQ: Denial of Service via Out of Memory vulnerability in Apache ActiveMQ Broker, Apache ActiveMQ, Apache ActiveMQ All.
This high-severity Apache Software Foundation advisory covers CVE-2026-49270 and CVE-2026-50750 affecting Apache ActiveMQ Broker, Apache ActiveMQ All.
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Summary
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.
- 5.19.7 through 5.19.8
- 6.2.6 through 6.2.7
- 6.2.6 through 6.2.7.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- 6.2.7
- 5.19.8
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation
Upgrade to a fixed release: 6.2.7, 5.19.8. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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