Authenticated code execution via HTTP Discovery redirect
Published Apr 24, 2026 · Updated Apr 24, 2026
Code injection in Apache ActiveMQ before 5.19.6 and 6.0.0 through 6.2.4 allows remote authenticated users to execute code on the broker JVM. BrokerView connector methods accept an HTTP Discovery URI whose attacker-controlled response supplies a blocked VM transport and brokerConfig URL, causing ResourceXmlApplicationContext to instantiate singleton beans before BrokerService validation. Exploitation requires Jolokia connector-management access and the activemq-http module on the classpath; successful exploitation executes arbitrary JVM-host commands.
Summary
What happened
Code injection in Apache ActiveMQ before 5.19.6 and 6.0.0 through 6.2.4 allows remote authenticated users to execute code on the broker JVM. BrokerView connector methods accept an HTTP Discovery URI whose attacker-controlled response supplies a blocked VM transport and brokerConfig URL, causing ResourceXmlApplicationContext to instantiate singleton beans before BrokerService validation. Exploitation requires Jolokia connector-management access and the activemq-http module on the classpath; successful exploitation executes arbitrary JVM-host commands.
The record
- CVE
- CVE-2026-40466
- Published
- Apr 24, 2026
- Updated
- Apr 24, 2026
- Vendor
- The Apache Software Foundation
- Product
- Apache ActiveMQ All
- Classifications
- CWE-94, CWE-20, T1059
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 24, 2026CVE publishedPublication date reported by the CVE source.
- Apr 24, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <5.19.6
- Affected versionversion=6.0.0 <6.2.5
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- ProjectDiscovery Nuclei CVE-2026-40466 templatefunctional · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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