---
id: CVE-2026-108949
title: >-
  Apache ActiveMQ, ActiveMQ Broker: Repeated rejected temporary destination
  consumer requests can lead to broker OOM
summary: >-
  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
  InvalidDestinationExcepti…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: adp
cwe:
  - CWE-401
vendor: Apache Software Foundation
product: 'org.apache.activemq:activemq-broker'
affected:
  - 'org.apache.activemq:activemq-broker >= 6.0.0 < 6.3.3'
  - 'org.apache.activemq:activemq-broker < 5.19.12'
  - 'org.apache.activemq:activemq-broker >= 6.0.0 < 6.3.3'
  - 'org.apache.activemq:activemq-broker < 5.19.12'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-04T21:12:22.051605Z'
published: '2026-11-04'
updated: '2026-11-04'
sourceUpdated: '2026-11-04T21:12:40.400Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-108949'
references:
  - url: 'https://lists.apache.org/thread/2l1jbc8j88w1n9bd44vm9bjtj9t3o80n'
tags:
  - cve.org
ingestedAt: '2026-11-05T21:36:00.607Z'
---

## Overview

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

- `org.apache.activemq:activemq-broker >= 6.0.0 < 6.3.3`
- `org.apache.activemq:activemq-broker < 5.19.12`
- `org.apache.activemq:activemq-broker >= 6.0.0 < 6.3.3`
- `org.apache.activemq:activemq-broker < 5.19.12`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.