What is CVE-2026-34197?

CVE-2026-34197 is a high-severity vulnerability in Apache Activemq, classified under Improper Input Validation. CVSS score: 8.8/10. Published 2026-04-07.

How severe is CVE-2026-34197?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2026-34197 known to be exploited?

Yes. CVE-2026-34197 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-04-16), indicating it is being actively exploited. 18 public proof-of-concept repositories are indexed.

RCE in Apache Activemq

CVE-2026-34197

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

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.972 (99.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Apache Activemq
Apache Activemq_broker
Apache Software Foundation Activemq — versions 0, 6.0.0
Apache Software Foundation Activemq All — versions 0, 6.0.0
Apache Software Foundation Activemq Broker — versions 0, 6.0.0

Weakness classification (CWE)

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2026-04-16. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2026-04-30.

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Public proof-of-concept exploits

References

security@apache.org (vendor-advisory, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Third Party Advisory)
0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Third Party Advisory)
0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Third Party Advisory)

Frequently asked questions

What is CVE-2026-34197?: CVE-2026-34197 is a high-severity vulnerability in Apache Activemq, classified under Improper Input Validation. CVSS score: 8.8/10. Published 2026-04-07.
How severe is CVE-2026-34197?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2026-34197 known to be exploited?: Yes. CVE-2026-34197 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-04-16), indicating it is being actively exploited. 18 public proof-of-concept repositories are indexed.