Bug 2566821 (CVE-2026-108949) - CVE-2026-108949 org.apache.activemq/activemq-broker: activemq-broker: Denial of Service via memory leak from rejected subscriptions
Summary: CVE-2026-108949 org.apache.activemq/activemq-broker: activemq-broker: Denial ...
Keywords:
Status: NEW
Alias: CVE-2026-108949
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-11-04 10:28 UTC by OSIDB Bzimport
Modified: 2026-11-05 13:02 UTC (History)
6 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-11-04 10:28:39 UTC 
Denial of Service via OOM vulnerability in Apache ActiveMQ, ActiveMQ Broker.



An authenticated OpenWire client that sends a ConsumerInfo for a temporary queue/topic owned by another connection is rejected with InvalidDestinationException, but the rejected Subscription is left behind in the region's subscriptions map. Repeating the request leaks broker heap until OOM because the broker does not clean up the rejected subscriptions in the map.



This issue affects Apache ActiveMQ: from 6.0.0 before 6.3.3, before 5.19.12; ActiveMQ Broker: from 6.0.0 before 6.3.3, before 5.19.12.



Users are recommended to upgrade to version 6.4.0, 6.3.3, or 5.19.12, which fixes the issue.
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