CVE-2026-34197

Published Apr 7, 2026

Last updated 25 days ago

Exploit known CVSS high 8.8

Apache ActiveMQ

Ubuntu

Server

Apache ActiveMQ Broker

Apache ActiveMQ Classic

Overview

AI description

Automated description summarized from trusted sources.

CVE-2026-34197 is an improper input validation and code injection vulnerability affecting Apache ActiveMQ Classic. This flaw resides in the Jolokia JMX-HTTP bridge, exposed on the web console, which by default permits `exec` operations on ActiveMQ MBeans, including `BrokerService.addNetworkConnector(String)` and `BrokerService.addConnector(String)`. An authenticated attacker can exploit this by invoking these operations with a specially crafted discovery URI. This URI triggers the VM transport's `brokerConfig` parameter to load a remote Spring XML application context, which then instantiates singleton beans and executes arbitrary code on the broker's Java Virtual Machine (JVM) through methods like `Runtime.exec()`. While exploitation typically requires authentication, certain versions of Apache ActiveMQ Classic (6.0.0 through 6.1.1) are also affected by CVE-2024-32114, which inadvertently exposes the Jolokia API without authentication. In these specific versions, CVE-2026-34197 can be exploited without credentials, effectively becoming an unauthenticated remote code execution vulnerability. This vulnerability has been present in the codebase for approximately 13 years and affects Apache ActiveMQ Broker versions before 5.19.4 and from 6.0.0 before 6.2.3.

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
Source: security@apache.org
NVD status: Analyzed
Products: activemq, activemq_broker

Risk scores

CVSS 3.1

Type: Secondary
Base score: 8.8
Impact score: 5.9
Exploitability score: 2.8
Vector string: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Severity: HIGH

Known exploits

Data from CISA

Vulnerability name: Apache ActiveMQ Improper Input Validation Vulnerability
Exploit added on: Apr 16, 2026
Exploit action due: Apr 30, 2026
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.

Weaknesses

security@apache.org: CWE-20

Hype score: Not currently trending

Configurations

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References

Sources include official advisories and independent security research.