CVEs / CVE-2026-34197

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

• Known exploited in the CISA KEV catalog since 16 Apr 2026
• high 8.8 CVSS 3.1 (from the CNA)
• EPSS 98.2% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
• Last changed at its sources 28 Oct 2026

Summary

Apache ActiveMQ contains an improper input validation vulnerability that allows for code injection.

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

Affected and fixed versions

Package versions from GHSA-rxpj-7qvf-xv32.

Exploitation

Severity

References

• CVE-2026-34197 on NVD
• CVE-2026-34197 in the CISA KEV catalog
• https://activemq.apache.org/security-advisories.data/CVE-2026-34197-announcement.txt (cited by CISA)
• CVE-2026-34197 on OSV
• https://activemq.apache.org/security-advisories.data/CVE-2026-34197-announcement.txt Vendor Advisory
• http://www.openwall.com/lists/oss-security/2026/04/06/3 Mailing List, Third Party Advisory
• https://access.redhat.com/security/cve/CVE-2026-34197 Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2455869 Third Party Advisory
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34197.json Third Party Advisory
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34197 US Government Resource