Riskcovery

CVE-2026-40466

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

State
Published
Severity
8.8 High
Published
Apr 24, 2026
Updated
Jul 15, 2026
Reserved
Apr 13, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.18.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HCISA-ADP
3.18.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hredhat-SADP

Weaknesses

  • CWE-20 Improper Input Validation
  • CWE-94 Improper Control of Generation of Code ('Code Injection')

Affected Products

ProductVersions
Apache ActiveMQ BrokerApache Software Foundation
  • before 5.19.6Affected
  • 6.0.0 to before 6.2.5Affected
Apache ActiveMQ AllApache Software Foundation
  • before 5.19.6Affected
  • 6.0.0 to before 6.2.5Affected
Apache ActiveMQApache Software Foundation
  • before 5.19.6Affected
  • 6.0.0 to before 6.2.5Affected

References

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