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Known exploited vulnerability

CVE-2026-34197

highCVSS 3.1 8.8In CISA KEVEPSS 98%Published · Apache Software Foundation

The short answer

CVE-2026-34197 affects Apache Software Foundation Apache ActiveMQ Broker and is rated high (CVSS 8.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2026-04-16: attackers are using it, so patch it first. Fixed versions are published for activemq-broker (5.19.5, 6.2.3) and activemq-all (5.19.5, 6.2.3).

What it is

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

Weakness: CWE-20, CWE-94, CWE-78.

Severity

8.8 high

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploited (CISA KEV)

Yes, since Apr 16, 2026

Federal due date Apr 30, 2026

EPSS, next 30 days

98%

Higher than 100% of scored CVEs

How it can be exploited

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

What CISA says to do

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

Affected packages and fixed versions

PackageEcosystemFixed inAdvisory
org.apache.activemq:activemq-brokerMaven5.19.5, 6.2.3GHSA-rxpj-7qvf-xv32
org.apache.activemq:activemq-allMaven5.19.5, 6.2.3GHSA-rxpj-7qvf-xv32

Is it in your code? Drop your lockfile into the free vulnerability check, or let vulnerability watch check your repository every day and open the upgrade as a pull request.

Affected products

Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ, Red Hat AMQ Broker 7, Red Hat Data Grid 8, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Fuse 7, Red Hat JBoss Enterprise Application Platform 7, Red Hat JBoss Enterprise Application Platform 8, Red Hat JBoss Enterprise Application Platform Expansion Pack. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2026-34197 being exploited?

Yes. CISA added CVE-2026-34197 to its Known Exploited Vulnerabilities catalog on 2026-04-16, with a federal remediation due date of 2026-04-30.

How do I fix CVE-2026-34197?

Upgrade to a fixed version: org.apache.activemq:activemq-broker (Maven) 5.19.5 or 6.2.3; org.apache.activemq:activemq-all (Maven) 5.19.5 or 6.2.3. CISA's 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.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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