{"id":"CVE-2026-33227","aliases":["BIT-activemq-2026-33227","GHSA-h2h4-5m64-m273"],"url":"https://o3.security/vulnerability/CVE-2026-33227","summary":"Apache ActiveMQ Client, Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ Web, Apache ActiveMQ: Improper Limitation of a Pathname to a Restricted Classpath Directory","details":"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.","published":"2026-04-07T07:50:58.897Z","modified":"2026-07-15T01:49:12.448933923Z","cvss":{"score":4.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.apache.activemq:activemq-client","fixedVersion":"5.19.3"},{"ecosystem":"Maven","name":"org.apache.activemq:activemq-client","fixedVersion":"6.2.2"},{"ecosystem":"Maven","name":"org.apache.activemq:activemq-broker","fixedVersion":"5.19.3"},{"ecosystem":"Maven","name":"org.apache.activemq:activemq-broker","fixedVersion":"6.2.2"},{"ecosystem":"Maven","name":"org.apache.activemq:activemq-all","fixedVersion":"5.19.3"},{"ecosystem":"Maven","name":"org.apache.activemq:activemq-all","fixedVersion":"6.2.2"},{"ecosystem":"Maven","name":"org.apache.activemq:activemq-web","fixedVersion":"5.19.3"},{"ecosystem":"Maven","name":"org.apache.activemq:activemq-web","fixedVersion":"6.2.2"}],"fix":null,"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/04/06/4"},{"type":"WEB","url":"https://repo.maven.apache.org/maven2"},{"type":"ADVISORY","url":"https://activemq.apache.org/security-advisories.data/CVE-2026-33227-announcement.txt"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33227.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33227"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:49:12.448933923Z"}}