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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Apache Software Foundation | Apache ActiveMQ Broker | < 5.19.6, 6.0.0 – < 6.2.5 | 5.19.6 |
| Apache Software Foundation | Apache ActiveMQ All | < 5.19.6, 6.0.0 – < 6.2.5 | 5.19.6 |
| Apache Software Foundation | Apache ActiveMQ | < 5.19.6, 6.0.0 – < 6.2.5 | 5.19.6 |
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 | — |
Automated scanner template
A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.
- Apache ActiveMQ - Remote Code Execution via HTTP Discovery Transport Bypass http/cves/2026/CVE-2026-40466.yaml
Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | org.apache.activemq:activemq-all | < 5.19.6 | 5.19.6 | GHSA-w3w2-mpp5-92gm |
| Maven | org.apache.activemq:activemq-all | >= 6.0.0, < 6.2.5 | 6.2.5 | GHSA-w3w2-mpp5-92gm |
| Maven | org.apache.activemq:activemq-broker | < 5.19.6 | 5.19.6 | GHSA-w3w2-mpp5-92gm |
| Maven | org.apache.activemq:activemq-broker | >= 6.0.0, < 6.2.5 | 6.2.5 | GHSA-w3w2-mpp5-92gm |
| Maven | org.apache.activemq:apache-activemq | < 5.19.6 | 5.19.6 | GHSA-w3w2-mpp5-92gm |
| Maven | org.apache.activemq:apache-activemq | >= 6.0.0, < 6.2.5 | 6.2.5 | GHSA-w3w2-mpp5-92gm |
Advisories 2
- WID-SEC-2026-3043 IBM QRadar SIEM: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 17, 2026
- WID-SEC-2026-1258 Apache ActiveMQ: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 13, 2026