CVE-2026-34197 KEV
Patch first
On CISA KEV — known exploited in the wild, due 2026-04-30.
Description
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
Scoring
| CVSS | 8.8 (HIGH, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 15.49% — more likely to be exploited than 97% of all CVEs |
| Weakness | CWE-20 |
| On CISA KEV | yes — remediate by 2026-04-30 |
| Public exploit | none known |
| Published | 2026-04-07 |
| Last modified | 2026-08-04 |
CISA KEV
| Name | Apache ActiveMQ Improper Input Validation Vulnerability |
|---|---|
| Added | 2026-04-16 |
| Due | 2026-04-30 |
| Vendor / product | Apache / ActiveMQ |
| Ransomware use | none reported |
Affected (2)
| Vendor | Product |
|---|---|
| apache | activemq |
| apache | activemq broker |
References
- https://activemq.apache.org/security-advisories.data/CVE-2026-34197-announcement.txt
- http://www.openwall.com/lists/oss-security/2026/04/06/3
- https://access.redhat.com/security/cve/CVE-2026-34197
- https://bugzilla.redhat.com/show_bug.cgi?id=2455869
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34197.json
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34197
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