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CVE-2026-108949

Apache ActiveMQ, ActiveMQ Broker: Repeated rejected temporary destination consumer requests can lead to broker OOM

6.5 Medium

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.47%Unchanged since Nov 5, 2026
90%50%10%1%

What each source reports

CVE List Score used 6.5

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.

Record
CVE-2026-108949
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-401
Updated
2026-11-06
EUVDEUVD-2026-116825 6.5

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.

Record
EUVD-2026-116825
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-06
GitHub AdvisoriesGHSA-5j2c-q47c-c6w5 6.5

Denial of Service via OOM vulnerability in Apache ActiveMQ, ActiveMQ Broker. An authenticated...

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.

Record
GHSA-5j2c-q47c-c6w5
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-401
Updated
2026-11-05
NVD 6.5

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.

Record
CVE-2026-108949
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-401
Updated
2026-11-04
OSVDEBIAN-CVE-2026-108949 6.5

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.

Record
DEBIAN-CVE-2026-108949
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-06
OSVUBUNTU-CVE-2026-108949 6.5

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.

Record
UBUNTU-CVE-2026-108949
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-06

Affected products

Affected packages

Affected packages
PackageAffectedFixed
activemq
Debian:12
 All versions, plus listed versions
5.17.2+dfsg-25.17.2+dfsg-2+deb12u15.17.6+dfsg-15.17.6+dfsg-2
 None known
activemq
Debian:13
 All versions, plus listed versions
5.17.6+dfsg-2
 None known
activemq
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
5.6.0+dfsg1-4+deb8u1ubuntu15.6.0+dfsg1-55.13.2+dfsg-25.13.2+dfsg-2ubuntu0.1~esm1
 None known
activemq
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
5.14.5-35.15.2-25.15.3-25.15.8-2~18.045.15.8-2~18.04.1~esm1
 None known
activemq
Ubuntu:Pro:20.04:LTS
 All versions, plus listed versions
5.15.10-15.15.11-15.15.11-1ubuntu0.1~esm1
 None known
activemq
Ubuntu:Pro:22.04:LTS
 All versions, plus listed versions
5.16.1-15.16.1-1ubuntu0.1~esm15.16.1-1ubuntu0.1
 None known
activemq
Ubuntu:24.04:LTS
 All versions, plus listed versions
5.17.2+dfsg-25.17.6+dfsg-1
 None known
activemq
Ubuntu:26.10
 All versions, plus listed versions
5.17.6+dfsg-25.17.6+dfsg-2ubuntu1
 None known
activemq
Ubuntu:26.04:LTS
 All versions, plus listed versions
5.17.6+dfsg-2
 None known

History

History
RecordedChangedSources
affected, aliases, referencesOSV
affected, aliases, referencesEUVD, GitHub Advisories, NVD, OSV
severityCVE List, NVD
publishedEUVD
publishedEUVD
aliases, referencesGitHub Advisories
cwes, references, titleCVE List, NVD
first indexedEUVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-108949 is a medium vulnerability (CVSS 6.5) in Apache Software Foundation Activemq Broker, published November 4, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.47%, the 40th percentile. No source names a fixed version.

References

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