CVE-2026-108949
Published:November 04, 2026
Updated:November 04, 2026
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.
Affected Packages
https://github.com/apache/activemq.git (GITHUB):
Affected version(s) >=activemq-5.19.8 <activemq-5.19.12Fix Suggestion:
Update to version activemq-5.19.12https://github.com/apache/activemq.git (GITHUB):
Affected version(s) >=activemq-6.2.7 <activemq-6.3.3 || >=activemq-6.3.0 <activemq-6.3.3Fix Suggestion:
Update to version activemq-6.3.3org.apache.activemq:activemq-broker (JAVA):
Affected version(s) >=6.2.7 <6.3.3 || >=6.3.0 <6.3.3Fix Suggestion:
Update to version 6.3.3org.apache.activemq:activemq-broker (JAVA):
Affected version(s) >=5.19.8 <5.19.12Fix Suggestion:
Update to version 5.19.12Related Resources (3)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Missing Release of Memory after Effective Lifetime