Apache ActiveMQ Vulnerable to Cross-site Scripting
Date: 2026-04
Affected: maven/org.apache.activemq:activemq-broker, maven/org.apache.activemq:activemq-all, maven/org.apache.activemq:apache-activemq
Attack vector: xss
Category: vulnerability-disclosure
Severity: Medium
CVE: CVE-2026-41043
CWE: CWE-79
CVSS: 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N)

Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in Apache ActiveMQ, Apache ActiveMQ Web. An authenticated attacker can show malicious content when browsing queues in the web console by overriding the content type to be HTML (instead of XML) and by injecting HTML into a JMS selector field. This issue affects Apache ActiveMQ: before 5.19.6, from 6.0.0 before 6.2.5; Apache ActiveMQ Web: before 5.19.6, from 6.0.0 before 6.2.5. Users are recommended to upgrade to version 6.2.5 or 5.19.6, which fixes the issue.


Mitigations:

Architectural layers (MAESTRO):