{"id":"CVE-2026-33227","published":"2026-04-07T07:50:58Z","modified":"2026-04-08T15:44:39Z","title":"Apache ActiveMQ Client, Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ Web, Apache ActiveMQ: Improper…","vendor":"Apache","product":"Apache ActiveMQ Client","tier":"tail","description":{"text":"Improper validation and restriction of a classpath path name vulnerability in \n\n Apache ActiveMQ Client, Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ Web, Apache ActiveMQ.\n\n\n\nIn two instances (when creating a Stomp consumer and also browsing messages in the Web console) an authenticated user provided \"key\" value could be constructed to traverse the classpath due to path concatenation. As a result, the application is exposed to a classpath path resource loading vulnerability that could potentially be chained together with another attack to lead to exploit.\n\n\n\n\n\nThis issue affects Apache ActiveMQ Client: before 5.19.3, from 6.0.0 before 6.2.2; Apache ActiveMQ Broker: before 5.19.3, from 6.0.0 before 6.2.2; Apache ActiveMQ All: before 5.19.3, from 6.0.0 before 6.2.2; Apache ActiveMQ Web: before 5.19.3, from 6.0.0 before 6.2.2; Apache ActiveMQ: before 5.19.3, from 6.0.0 before 6.2.2.\n\nUsers are recommended to upgrade to version 5.19.4 or 6.2.3, which fixes the issue. Note: 5.19.3 and 6.2.2 also fix this issue, but that is limited to non-Windows environments due to a path separator resolution bug fixed in 5.19.4 and 6.2.3.","provenance":"source","from":"CVE.org"},"cvss":{"score":4.3,"severity":"MEDIUM","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","provenance":"source","from":"CISA ADP Vulnrichment"},"epss":{"score":0.00419,"percentile":0.361,"provenance":"source"},"cwes":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"references":[{"url":"https://activemq.apache.org/security-advisories.data/CVE-2026-33227-announcement.txt","tags":["vendor-advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2026/04/06/4","tags":[]}],"priority":{"score":10.2,"factors":[{"name":"EPSS percentile","points":7.22},{"name":"CVSS severity","points":3.01}]},"vendorSlug":"apache","affectedVersions":[{"vendor":"Apache Software Foundation","product":"Apache ActiveMQ Client","versions":["< 5.19.3",">= 6.0.0, < 6.2.2"]},{"vendor":"Apache Software Foundation","product":"Apache ActiveMQ Broker","versions":["< 5.19.3",">= 6.0.0, < 6.2.2"]},{"vendor":"Apache Software Foundation","product":"Apache ActiveMQ All","versions":["< 5.19.3",">= 6.0.0, < 6.2.2"]},{"vendor":"Apache Software Foundation","product":"Apache ActiveMQ Web","versions":["< 5.19.3",">= 6.0.0, < 6.2.2"]},{"vendor":"Apache Software Foundation","product":"Apache ActiveMQ","versions":["< 5.19.3",">= 6.0.0, < 6.2.2"]}],"affected":[{"ecosystem":"Maven","package":"org.apache.activemq:activemq-client","vulnerableRanges":["<5.19.3",">=6.0.0, <6.2.2"],"patched":["5.19.3","6.2.2"],"from":["GHSA-h2h4-5m64-m273"],"provenance":"source"},{"ecosystem":"Maven","package":"org.apache.activemq:activemq-broker","vulnerableRanges":["<5.19.3",">=6.0.0, <6.2.2"],"patched":["5.19.3","6.2.2"],"from":["GHSA-h2h4-5m64-m273"],"provenance":"source"},{"ecosystem":"Maven","package":"org.apache.activemq:activemq-all","vulnerableRanges":["<5.19.3",">=6.0.0, <6.2.2"],"patched":["5.19.3","6.2.2"],"from":["GHSA-h2h4-5m64-m273"],"provenance":"source"},{"ecosystem":"Maven","package":"org.apache.activemq:activemq-web","vulnerableRanges":["<5.19.3",">=6.0.0, <6.2.2"],"patched":["5.19.3","6.2.2"],"from":["GHSA-h2h4-5m64-m273"],"provenance":"source"}],"euvd":{"id":"EUVD-2026-19586","exploited":false,"provenance":"source"},"lineage":{"packageHistory":[{"cve":"CVE-2019-0222","published":"2019-03-28","fixed":"5.15.9","kev":false},{"cve":"CVE-2023-46604","published":"2023-10-27","fixed":"5.18.3","kev":true},{"cve":"CVE-2025-27533","published":"2025-05-07","fixed":"6.1.6","kev":false,"link":{"from":"CVE-2025-27533","to":"CVE-2026-33227","relation":"successor","confidence":"low","kind":"sequence","evidence":[{"kind":"version-step","provenance":"source","package":"Maven:org.apache.activemq:activemq-client","fromFixed":"5.18.7","toFixed":"5.19.3","daysApart":335},{"kind":"version-step","provenance":"source","package":"Maven:org.apache.activemq:activemq-client","fromFixed":"6.1.6","toFixed":"6.2.2","daysApart":335}]}},{"cve":"CVE-2026-33227","published":"2026-04-07","fixed":"6.2.2","kev":false},{"cve":"CVE-2026-39304","published":"2026-04-10","fixed":"6.2.4","kev":false,"link":{"from":"CVE-2026-33227","to":"CVE-2026-39304","relation":"successor","confidence":"medium","kind":"sequence","evidence":[{"kind":"version-step","provenance":"source","package":"Maven:org.apache.activemq:activemq-client","fromFixed":"5.19.3","toFixed":"5.19.4","daysApart":3},{"kind":"version-step","provenance":"source","package":"Maven:org.apache.activemq:activemq-client","fromFixed":"6.2.2","toFixed":"6.2.4","daysApart":3},{"kind":"similar","provenance":"machine","score":0.41,"basis":"same product + description similarity"}]}}],"package":"Maven:org.apache.activemq:activemq-client"}}