CVE-2026-41043: Apache ActiveMQ

Medium severity, CVSS 6.5. EPSS: 0.7% chance of exploitation in the next 30 days.

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.

Affected products

• Apache ActiveMQ: before 5.19.6 (fixed in 5.19.6); from 6.0.0, before 6.2.5 (fixed in 6.2.5)
• Apache ActiveMQ Web: before 5.19.6 (fixed in 5.19.6); from 6.0.0, before 6.2.5 (fixed in 6.2.5)

Published 2026-04-24. Last modified 2026-06-17.