CVE-2026-108949
Apache ActiveMQ, ActiveMQ Broker: Repeated rejected temporary destination consumer requests can lead to broker OOM
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Apache ActiveMQ Apache Software Foundation org.apache.activemq:activemq-broker
maven |
≥ 6.0.0; < 6.3.3 (affected, semver) ≥ 0; < 5.19.12 (affected, semver) Other versions: unaffected |
CNA: apache |
| ActiveMQ Broker Apache Software Foundation org.apache.activemq:activemq-broker
maven |
≥ 6.0.0; < 6.3.3 (affected, semver) ≥ 0; < 5.19.12 (affected, semver) Other versions: unaffected |
CNA: apache |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 6.5 medium |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | ADP: CISA-ADP |
| 3.1 / 6.5 medium |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD: 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://lists.apache.org/thread/2l1jbc8j88w1n9bd44vm9bjtj9t3o80nCNA: apache · vendor-advisory
- http://www.openwall.com/lists/oss-security/2026/11/03/18ADP: CVE
- https://lists.apache.org/thread/2l1jbc8j88w1n9bd44vm9bjtj9t3o80n[email protected]
- http://www.openwall.com/lists/oss-security/2026/11/03/18af854a3a-2127-422b-91ae-364da2661108
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