{"cve":"CVE-2026-42253","nvd":{"published":"2026-06-01T09:16:18.673","modified":"2026-07-22T07:10:00.107","status":"Analyzed","description":"Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Apache ActiveMQ, Apache ActiveMQ Web.\n\nThe MessageServlet in the ActiveMQ web console API copies every JMS message\nproperty into an HTTP response header without any validation. This can allow overwriting and injecting security headers by setting them on JMS messages that are returned by the servlet.\n\nThis issue affects Apache ActiveMQ: before 5.19.7, from 6.0.0 before 6.2.6; Apache ActiveMQ Web: before 5.19.7, from 6.0.0 before 6.2.6.\n\nUsers are recommended to upgrade to version 5.19.7 or 6.2.6, which fixes the issue. The MessageServlet has now been deprecated and disabled by default.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79"],"references":["https://lists.apache.org/thread/j9vmlc410ht5f28fc98gx75jcbq62j00","http://www.openwall.com/lists/oss-security/2026/05/31/17"],"products":["apache:activemq","apache:activemq_web"],"source":"nvd","synced_at":"2026-10-19T22:37:48.043517290+00:00"},"epss":{"cve":"CVE-2026-42253","score":0.01018,"percentile":0.63352,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-8wm6-6fqh-phmc","url":"https://osv.dev/vulnerability/GHSA-8wm6-6fqh-phmc","summary":"Apache ActiveMQ, Apache ActiveMQ Web have a Cross-site Scripting issue","modified":"2026-07-09T21:11:09.759896380Z","packages":[{"ecosystem":"Maven","name":"org.apache.activemq:apache-activemq","purl":"pkg:maven/org.apache.activemq/apache-activemq","ranges":["<5.19.7"],"fixed":["5.19.7"]},{"ecosystem":"Maven","name":"org.apache.activemq:apache-activemq","purl":"pkg:maven/org.apache.activemq/apache-activemq","ranges":[">=6.0.0 <6.2.6"],"fixed":["6.2.6"]},{"ecosystem":"Maven","name":"org.apache.activemq:activemq-web","purl":"pkg:maven/org.apache.activemq/activemq-web","ranges":["<5.19.7"],"fixed":["5.19.7"]},{"ecosystem":"Maven","name":"org.apache.activemq:activemq-web","purl":"pkg:maven/org.apache.activemq/activemq-web","ranges":[">=6.0.0 <6.2.6"],"fixed":["6.2.6"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}