# CVE-2026-41043: apache-activemq XSS — Fixed in 5.19.6 ☕ ☕ Maven Not in CISA KEV MEDIUM severity # CVE-2026-41043 — apache-activemq MEDIUM CVE-2026-41043 is a medium-severity (CVSS 6.5) Cross-site Scripting (XSS) vulnerability in org.apache.activemq:apache-activemq. A fix is available for org.apache.activemq:apache-activemq — see the affected versions and patch details below. Apache ActiveMQ, Apache ActiveMQ Web: ActiveMQ Web Console - XSS vulnerability when browsing queues Also known asBIT-activemq-2026-41043[GHSA-2jp3-2923-9h52](/vulnerability/GHSA-2jp3-2923-9h52) Published Apr 24, 2026 Updated Oct 28, 2026 Affected 6 pkgs Patched 6 / 6 Exploits None indexed Exploitation data as of Nov 9, 2026 · OSV.dev, NVD, FIRST.org (EPSS) ## Exploitation Status ### No confirmed exploitation observed yet - CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks. - CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment. Exploitation and automatability from CISA’s SSVC triage for CVE-2026-41043. ## EPSS Exploitation Probability [via FIRST.org ↗](https://www.first.org/epss/) 0.6%probability of exploitation in next 30 days Lower Risk0.00% Lower risk than most CVEs47th percentile — riskier than 47% of all scored CVEsHighest risk 0.00%0.41%0.81%1.22%0.1%0.6%May 26Sep 26Nov 26 Probability of exploitation in the next 30 days, from [FIRST.org EPSS](https://www.first.org/epss/). ## How urgent is this, really ## Where this sits among everything scored ## Real-World Exposure 6 pkgs affected ☕`org.apache.activemq:apache-activemq`☕`org.apache.activemq:activemq-all`☕`org.apache.activemq:activemq-broker`☕`org.apache.activemq:apache-activemq`☕`org.apache.activemq:activemq-all`☕`org.apache.activemq:activemq-broker` Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems. ## Description 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 Packages 6 total 6 fixed Ecosystem Package Vulnerable range Fix ☕Maven `org.apache.activemq:apache-activemq` all versions 5.19.6`org.apache.activemq:apache-activemq:5.19.6` ☕Maven `org.apache.activemq:activemq-all` all versions 5.19.6`org.apache.activemq:activemq-all:5.19.6` ☕Maven `org.apache.activemq:activemq-broker` all versions 5.19.6`org.apache.activemq:activemq-broker:5.19.6` ☕Maven `org.apache.activemq:apache-activemq` ≥ 6.0.0&&< 6.2.5 6.2.5`org.apache.activemq:apache-activemq:6.2.5` ☕Maven `org.apache.activemq:activemq-all` ≥ 6.0.0&&< 6.2.5 6.2.5`org.apache.activemq:activemq-all:6.2.5` ☕Maven `org.apache.activemq:activemq-broker` ≥ 6.0.0&&< 6.2.5 6.2.5`org.apache.activemq:activemq-broker:6.2.5` ## Affected Products 2 products · 4 configurations Application `activemq`apache ≥ 6.0.0 && < 6.2.5 range Application `activemq web`apache ≥ 6.0.0 && < 6.2.5 range ## Detection & mitigation playbook Open-source dependency 1. ### Detect Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.activemq:apache-activemq, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version. 2. ### Fix Update org.apache.activemq:apache-activemq to 5.19.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-41043 is resolved across your whole dependency graph. 3. ### Workarounds Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page. ## Frequently Asked Questions 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. O3 Security · Impact-Aware SCA ### Is CVE-2026-41043 in your dependencies? Find it across Maven, including transitive dependencies. [Scan my dependencies](/book-demo) [How O3 SCA works](/impact-aware-sca)