Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ: Possible bypass of CVE-2026-34197 via HTTP discovery second-stage URI

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Summary

CVECVE-2026-40466
StatePUBLISHED
Assignerapache
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-24 11:16:22 UTC
Updated2026-04-24 11:16:22 UTC
DescriptionImproper 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.

Risk And Classification

Problem Types: CWE-20 | CWE-94 | CWE-20 CWE-20 Improper Input Validation | CWE-94 CWE-94 Improper Control of Generation of Code ('Code Injection')

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Apache Software Foundation Apache ActiveMQ Broker affected 5.19.6 semver Not specified
CNA Apache Software Foundation Apache ActiveMQ Broker affected 6.0.0 6.2.5 semver Not specified
CNA Apache Software Foundation Apache ActiveMQ All affected 5.19.6 semver Not specified
CNA Apache Software Foundation Apache ActiveMQ All affected 6.0.0 6.2.5 semver Not specified
CNA Apache Software Foundation Apache ActiveMQ affected 5.19.6 semver Not specified
CNA Apache Software Foundation Apache ActiveMQ affected 6.0.0 6.2.5 semver Not specified

References

ReferenceSourceLinkTags
activemq.apache.org/security-advisories.data/CVE-2026-34197-announcement.txt [email protected] activemq.apache.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Fatih Ersinadim (en)

CNA: gggggggga (en)

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