Severity: important
Affected versions:
- Apache ActiveMQ Broker (org.apache.activemq:activemq-broker) before 5.19.6
- Apache ActiveMQ Broker (org.apache.activemq:activemq-broker) 6.0.0 before
6.2.5
- Apache ActiveMQ All (org.apache.activemq:activemq-all) before 5.19.6
- Apache ActiveMQ All (org.apache.activemq:activemq-all) 6.0.0 before 6.2.5
- Apache ActiveMQ (org.apache.activemq:apache-activemq) before 5.19.6
- Apache ActiveMQ (org.apache.activemq:apache-activemq) 6.0.0 before 6.2.5
Description:
Improper Input Validation, Improper Control of Generation of Code ('Code
Injection') vulnerability in Apache ActiveMQ Broker, Apache ActiveMQ All,
Apache ActiveMQ.
An authenticated attacker may bypass the fix in CVE-2026-34197 by adding a
connector using an HTTP Discovery transport via BrokerView.addNetworkConnector
or BrokerView.addConnector through Jolokia if the activemq-http module is on
the classpath.
A malicious HTTP endpoint can return a VM transport through the HTTP URI which
will bypass the validation added in CVE-2026-34197. The attacker can then use
the VM transport's brokerConfig parameter to load a remote Spring XML
application context using ResourceXmlApplicationContext.
Because Spring's ResourceXmlApplicationContext instantiates all singleton beans
before the BrokerService validates the configuration, arbitrary code execution
occurs on the broker's JVM through bean factory methods such as Runtime.exec().
This issue affects Apache ActiveMQ Broker: before 5.19.6, from 6.0.0 before
6.2.5; Apache ActiveMQ All: before 5.19.6, from 6.0.0 before 6.2.5; Apache
ActiveMQ: before 5.19.6, from 6.0.0 before 6.2.5.
Users are recommended to upgrade to version 5.19.6 or 6.2.5, which fixes the
issue.
Credit:
Fatih Ersinadim (finder)
gggggggga (finder)
References:
https://activemq.apache.org/security-advisories.data/CVE-2026-34197-announcement.txt
https://activemq.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-40466
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