How severe is CVE-2026-34197?

CVE-2026-34197 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-34197 being actively exploited?

Yes. CVE-2026-34197 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-04-16, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2026-34197?

CVE-2026-34197 primarily affects Apache Activemq. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-34197?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2026-34197 have an EU (EUVD) identifier?

Yes. CVE-2026-34197 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19588. It is also flagged as exploited in the EUVD (since 2026-04-16).

When was CVE-2026-34197 published?

CVE-2026-34197 was published on 2026-04-07 and last updated on 2026-06-30.

CVE-2026-34197

CVE-2026-34197 is a high-severity vulnerability in Apache Activemq with a CVSS 3.x base score of 8.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2026-04-16). The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 97% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2026-04-16)
EU (EUVD) id: EUVD-2026-19588
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2026-04-16)
Weakness: CWE-20
Affected product: Apache Activemq
Published: 2026-04-07
Last modified: 2026-06-30

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

Frequently asked questions

What is 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
How severe is CVE-2026-34197?: CVE-2026-34197 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-34197 being actively exploited?: Yes. CVE-2026-34197 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-04-16, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2026-34197?: CVE-2026-34197 primarily affects Apache Activemq. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-34197?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2026-34197 have an EU (EUVD) identifier?: Yes. CVE-2026-34197 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19588. It is also flagged as exploited in the EUVD (since 2026-04-16).
When was CVE-2026-34197 published?: CVE-2026-34197 was published on 2026-04-07 and last updated on 2026-06-30.

References

Affected products (2)

cpe:2.3:a:apache:activemq:*:*:*:*:*:*:*:*
cpe:2.3:a:apache:activemq_broker:*:*:*:*:*:*:*:*

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