Description
Denial of Service via Out of Memory vulnerability in Apache ActiveMQ Broker, Apache ActiveMQ, Apache ActiveMQ All.
Following the fix for CVE-2026-49270 an unauthenticated attacker can now cause broker OOM by sending an repeated BrokerInfo commands without sending a ConnectionInfo, until the broker will crash with OOM.
This issue affects Apache ActiveMQ Broker: from 5.19.7 before 5.19.8, from 6.2.6 before 6.2.7; Apache ActiveMQ: from 5.19.7 before 5.19.8, from 6.2.6 before 6.2.7; Apache ActiveMQ All: from 5.19.7 before 5.19.8, from 6.2.6 before 6.2.7.
Users are recommended to upgrade to version 6.2.7, which fixes the issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Apache Software Foundation | Apache ActiveMQ Broker | 5.19.7 – < 5.19.8, 6.2.6 – < 6.2.7 | 5.19.8 |
| Apache Software Foundation | Apache ActiveMQ | 5.19.7 – < 5.19.8, 6.2.6 – < 6.2.7 | 5.19.8 |
| Apache Software Foundation | Apache ActiveMQ All | 5.19.7 – < 5.19.8, 6.2.6 – < 6.2.7 | 5.19.8 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 13 | activemq | No fix yet | — |
| Debian 12 | activemq | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | activemq | No fix yet | — |
| Ubuntu 26.04 LTS | activemq | No fix yet | — |
| Ubuntu 25.10 | activemq | No fix yet | — |
| Ubuntu 24.04 LTS | activemq | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | activemq | No fix yet | — |
| Ubuntu Pro 20.04 LTS | activemq | No fix yet | — |
| Ubuntu Pro 18.04 LTS | activemq | No fix yet | — |
| Ubuntu Pro 16.04 LTS | activemq | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | org.apache.activemq:activemq-all | >= 5.19.7, < 5.19.8 | 5.19.8 | GHSA-9qj4-v6r6-3wmx |
| Maven | org.apache.activemq:activemq-all | >= 6.2.6, < 6.2.7 | 6.2.7 | GHSA-9qj4-v6r6-3wmx |
| Maven | org.apache.activemq:activemq-broker | >= 5.19.7, < 5.19.8 | 5.19.8 | GHSA-9qj4-v6r6-3wmx |
| Maven | org.apache.activemq:activemq-broker | >= 6.2.6, < 6.2.7 | 6.2.7 | GHSA-9qj4-v6r6-3wmx |
| Maven | org.apache.activemq:apache-activemq | >= 5.19.7, < 5.19.8 | 5.19.8 | GHSA-9qj4-v6r6-3wmx |
| Maven | org.apache.activemq:apache-activemq | >= 6.2.6, < 6.2.7 | 6.2.7 | GHSA-9qj4-v6r6-3wmx |
Advisories 2
- WID-SEC-2026-4056 Atlassian Produkte (Bamboo, Bitbucket, Confluence, Crucible, Fisheye und Jira): Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2026
- WID-SEC-2026-2124 Apache ActiveMQ: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 21, 2026
References
- https://lists.apache.org/thread/nhkmbdym61yp6wwy0dny8w1p46sm87kr vendor-advisory