{"answers":{"affected":"9 open source packages ship an affected version, including org.apache.activemq:activemq-web, activemq and org.apache.activemq:apache-activemq. It affects 2 products.","exploited":"There is no known exploitation of CVE-2026-42253 in the wild and no public exploit code.","fix":"Upgrade org.apache.activemq:activemq-web to a fixed version for your release line: 5.19.7 or 6.2.6.","what":"CVE-2026-42253 is a medium-severity cross-site scripting vulnerability in Apache Activemq, published on 1 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-42253 and fix it if it is affected.\n\nWhat it is: CVE-2026-42253 is a medium-severity cross-site scripting vulnerability in Apache Activemq, published on 1 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-42253 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.apache.activemq:activemq-web (Maven): affected all versions; fixed in 5.19.7\n- org.apache.activemq:activemq-web (Maven): affected all versions; fixed in 5.19.7\n- org.apache.activemq:activemq-web (Maven): affected from 6.0.0; fixed in 6.2.6\n- org.apache.activemq:activemq-web (Maven): affected from 6.0.0; fixed in 6.2.6\n- activemq (Bitnami): affected all versions; fixed in 5.19.7, 6.2.6\n- org.apache.activemq:apache-activemq (Maven): affected all versions; fixed in 5.19.7\n- org.apache.activemq:apache-activemq (Maven): affected all versions; fixed in 5.19.7\n- org.apache.activemq:apache-activemq (Maven): affected from 6.0.0; fixed in 6.2.6\n- org.apache.activemq:apache-activemq (Maven): affected from 6.0.0; fixed in 6.2.6\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-42253/ (Markdown: https://insights.sbomify.com/CVE-2026-42253/index.md)","id":"CVE-2026-42253","markdown":"https://insights.sbomify.com/CVE-2026-42253/index.md","name":"CVE-2026-42253","record":{"aliases":["BIT-activemq-2026-42253","DEBIAN-CVE-2026-42253","GHSA-8wm6-6fqh-phmc","MINI-2m22-g7jx-cchc","MINI-46vv-vwv8-cq6r","MINI-5h6m-q7c6-qcrp","MINI-v6pr-c5c2-586p","UBUNTU-CVE-2026-42253"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Apache ActiveMQ","requires_auth":"none","summary":"Attackers can inject HTTP response headers via JMS message properties in the ActiveMQ web console, potentially bypassing security controls.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apache","cpe":[{"product":"activemq","vendor":"apache"},{"product":"activemq_web","vendor":"apache"}],"cvss":{"score":6.1,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"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.","ecosystems":["Bitnami","Maven"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Apache ActiveMQ, Apache ActiveMQ Web: HTTP Response Header Injection via JMS Message Properties","id":"CVE-2026-42253","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"apache:activemq","products":["apache:activemq"],"type":"xss","year":"2026"},"n_packages":9,"n_references":1,"next":{"headline":"Other in Hickory DNS","id":"CVE-2026-42254"},"packages":[{"ecosystem":"Bitnami","fixed":["5.19.7","6.2.6"],"introduced":["0","6.0.0"],"last_affected":[],"package":"activemq","purl":"pkg:bitnami/activemq","source":"BIT-activemq-2026-42253"},{"ecosystem":"Maven","fixed":["5.19.7"],"introduced":["0"],"last_affected":[],"package":"org.apache.activemq:activemq-web","purl":null,"source":"GHSA-8wm6-6fqh-phmc"},{"ecosystem":"Maven","fixed":["5.19.7"],"introduced":["0"],"last_affected":[],"package":"org.apache.activemq:activemq-web","purl":"pkg:maven/org.apache.activemq/activemq-web","source":"GHSA-8wm6-6fqh-phmc"},{"ecosystem":"Maven","fixed":["6.2.6"],"introduced":["6.0.0"],"last_affected":[],"package":"org.apache.activemq:activemq-web","purl":null,"source":"GHSA-8wm6-6fqh-phmc"},{"ecosystem":"Maven","fixed":["6.2.6"],"introduced":["6.0.0"],"last_affected":[],"package":"org.apache.activemq:activemq-web","purl":"pkg:maven/org.apache.activemq/activemq-web","source":"GHSA-8wm6-6fqh-phmc"},{"ecosystem":"Maven","fixed":["5.19.7"],"introduced":["0"],"last_affected":[],"package":"org.apache.activemq:apache-activemq","purl":null,"source":"GHSA-8wm6-6fqh-phmc"},{"ecosystem":"Maven","fixed":["5.19.7"],"introduced":["0"],"last_affected":[],"package":"org.apache.activemq:apache-activemq","purl":"pkg:maven/org.apache.activemq/apache-activemq","source":"GHSA-8wm6-6fqh-phmc"},{"ecosystem":"Maven","fixed":["6.2.6"],"introduced":["6.0.0"],"last_affected":[],"package":"org.apache.activemq:apache-activemq","purl":null,"source":"GHSA-8wm6-6fqh-phmc"},{"ecosystem":"Maven","fixed":["6.2.6"],"introduced":["6.0.0"],"last_affected":[],"package":"org.apache.activemq:apache-activemq","purl":"pkg:maven/org.apache.activemq/apache-activemq","source":"GHSA-8wm6-6fqh-phmc"}],"prev":{"headline":"Apache Airflow: BashOperator Jinja2 injection via dag_run.conf — low-privilege user pattern","id":"CVE-2026-42252"},"products":["Apache ActiveMQ","Apache ActiveMQ Web"],"published":"2026-06-01","related":[{"cvss_score":10,"headline":"Apache ActiveMQ Deserialization of Untrusted Data","id":"CVE-2023-46604","kev_date_added":"2023-11-02","published":"2023-10-27"},{"cvss_score":9.8,"headline":"Apache ActiveMQ Improper Input Validation","id":"CVE-2016-3088","kev_date_added":"2022-02-10","published":"2016-06-01"},{"cvss_score":8.8,"headline":"Apache ActiveMQ Improper Input Validation","id":"CVE-2026-34197","kev_date_added":"2026-04-16","published":"2026-04-07"},{"cvss_score":9.8,"headline":"Remote code execution in Apache ActiveMQ","id":"CVE-2020-11998","kev_date_added":null,"published":"2020-09-10"},{"cvss_score":9.8,"headline":"Command Injection in Xstream","id":"CVE-2013-7285","kev_date_added":null,"published":"2019-05-15"},{"cvss_score":9.8,"headline":"Improper Restriction of XML External Entity Reference in Apache ActiveMQ","id":"CVE-2014-3600","kev_date_added":null,"published":"2017-10-27"},{"cvss_score":9.8,"headline":"Improper Input Validation in Apache ActiveMQ","id":"CVE-2015-5254","kev_date_added":null,"published":"2016-01-08"}],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-03","vendors":["Apache Software Foundation"]},"summary":"Attackers can inject HTTP response headers via JMS message properties in the ActiveMQ web console, potentially bypassing security controls.","url":"https://insights.sbomify.com/CVE-2026-42253/"}