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.
Advisories

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Fixes

Solution

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Workaround

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History

Wed, 04 Nov 2026 12:00:00 +0000

Type Values Removed Values Added
First Time appeared Apache
Apache activemq
Apache activemq Broker
Vendors & Products Apache
Apache activemq
Apache activemq Broker

Wed, 04 Nov 2026 10:45:00 +0000

Type Values Removed Values Added
References

Wed, 04 Nov 2026 09:45:00 +0000

Type Values Removed Values Added
Description 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.
Title Apache ActiveMQ, ActiveMQ Broker: Repeated rejected temporary destination consumer requests can lead to broker OOM
Weaknesses CWE-401
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-11-04T10:10:18.513Z

Reserved: 2026-10-11T19:04:09.189Z

Link: CVE-2026-108949

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-11-04T10:17:24.160

Modified: 2026-11-04T14:10:09.713

Link: CVE-2026-108949

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-04T11:45:12Z

Weaknesses