# CVE-2026-34197: Apache ActiveMQ Improper Input Validation Vulnerability

- Exploited (CISA KEV): yes, added 2026-04-16
- Published: 2026-04-07
- CVSS: 8.8 HIGH (v3.1)
- EPSS: 98.3% (100th percentile)
- CWE: CWE-20, CWE-94

Improper Input Validation, Improper Control of Generation of Code ('Code Injection') vulnerability in Apache ActiveMQ Broker, Apache ActiveMQ.

Apache ActiveMQ Classic exposes the Jolokia JMX-HTTP bridge at /api/jolokia/ on the web console. The default Jolokia access policy permits exec operations on all ActiveMQ MBeans (org.apache.activemq:*), including
BrokerService.addNetworkConnector(String) and BrokerService.addConnector(String).

An authenticated attacker can invoke these operations with a crafted discovery URI that triggers 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 5.19.4, from 6.0.0 before 6.2.3; Apache ActiveMQ All: before 5.19.4, from 6.0.0 before 6.2.3; Apache ActiveMQ: before 5.19.4, from 6.0.0 before 6.2.3.



Users are recommended to upgrade to version 5.19.4 or 6.2.3, which fixes the issue

## Edge WAF coverage (claimed by vendors, not measured)

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | Blocks by default | 2026-04-21 | 14 |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | No public claim | — | — |
| Fastly | Before feed history | — | — |
| F5 | Rule published | 2026-07-07 | 91 |
| Akamai | No public source | — | — |
| OWASP CRS | No public claim | — | — |

### Cloudflare

- 2026-04-21 · new · rule 26ef21cb197b44fc8a98b7cebf170a17 · default Block
  > Apache ActiveMQ - Remote Code Execution - CVE:CVE-2026-34197. Previous action: Log. New action: Block. This is a new detection.
  Source: https://developers.cloudflare.com/changelog/post/2026-04-21-waf-release/

### F5

- 2026-07-07 · new · rule 200103683
  > Added: signature 200103683 "Apache ActiveMQ Jolokia BrokerConfig Code Injection" (Command Execution, risk High), systems: Spring Boot. References: CVE-2026-34197.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog
- 2026-09-16 · updated · rule 200103683
  > Updated: signature 200103683 "Apache ActiveMQ Jolokia BrokerConfig Code Injection" (Command Execution, risk High), systems: Spring Boot. References: CVE-2026-34197, CVE-2026-42588.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog

## Our test (measured)

- OWASP Core Rule Set 4.25.0, paranoia level 1, anomaly threshold 5, default CRS settings: passed (0 of 2 requests blocked), template CVE-2026-34197, 2026-11-02
- OWASP Core Rule Set 4.25.0, paranoia level 2, anomaly threshold 5, default CRS settings: blocked (2 of 2 requests blocked), template CVE-2026-34197, 2026-11-02

"No public claim" means no vendor statement names this CVE; "Before feed history" means the CVE is older than the vendor feed. In both cases generic rules may still block it.

HTML: https://cve.vigilbase.com/cve/CVE-2026-34197 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2026-34197