XSS in Apache Activemq
CVE-2026-41043
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.007 (53.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.007 · change: +0.002
Affected products
- Apache Activemq
- Apache Activemq Web
- Apache Software Foundation Activemq — versions 0, 6.0.0
- Apache Software Foundation Activemq Web — versions 0, 6.0.0
Weakness classification (CWE)
References
- activemq.apache.org/security-advisories.data/CVE-2026-41043-announcement.txt (vendor-advisory, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List)
Frequently asked questions
- What is CVE-2026-41043?
- CVE-2026-41043 is a medium-severity vulnerability in Apache Activemq, classified under Cross-site Scripting. CVSS score: 6.5/10. Published 2026-04-24.
- How severe is CVE-2026-41043?
- Medium severity. CVSS v3 base score is 6.5 out of 10.