{"id":"UBUNTU-CVE-2026-33227","details":"Improper validation and restriction of a classpath path name vulnerability in  Apache ActiveMQ Client, Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ Web, Apache ActiveMQ. In 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. This 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. Users 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.","modified":"2026-05-20T16:25:28.052198706Z","published":"2026-04-07T09:16:00Z","upstream":["CVE-2026-33227"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-33227"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-33227"},{"type":"REPORT","url":"https://activemq.apache.org/security-advisories.data/CVE-2026-33227-announcement.txt"},{"type":"REPORT","url":"http://www.openwall.com/lists/oss-security/2026/04/06/4"}],"affected":[{"package":{"name":"activemq","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/activemq?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.6.0+dfsg1-4+deb8u1ubuntu1","5.6.0+dfsg1-5","5.13.2+dfsg-2","5.13.2+dfsg-2ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"5.13.2+dfsg-2ubuntu0.1~esm1","binary_name":"activemq"},{"binary_version":"5.13.2+dfsg-2ubuntu0.1~esm1","binary_name":"libactivemq-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33227.json"}},{"package":{"name":"activemq","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/activemq?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.14.5-3","5.15.2-2","5.15.3-2","5.15.8-2~18.04","5.15.8-2~18.04.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"activemq","binary_version":"5.15.8-2~18.04.1~esm1"},{"binary_name":"libactivemq-java","binary_version":"5.15.8-2~18.04.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33227.json"}},{"package":{"name":"activemq","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/activemq?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.15.10-1","5.15.11-1","5.15.11-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"activemq","binary_version":"5.15.11-1ubuntu0.1~esm1"},{"binary_name":"libactivemq-java","binary_version":"5.15.11-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33227.json"}},{"package":{"name":"activemq","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/activemq?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.16.1-1","5.16.1-1ubuntu0.1~esm1","5.16.1-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_version":"5.16.1-1ubuntu0.1","binary_name":"activemq"},{"binary_version":"5.16.1-1ubuntu0.1","binary_name":"libactivemq-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33227.json"}},{"package":{"name":"activemq","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/activemq?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.17.2+dfsg-2","5.17.6+dfsg-1"],"ecosystem_specific":{"binaries":[{"binary_name":"activemq","binary_version":"5.17.6+dfsg-1"},{"binary_name":"libactivemq-java","binary_version":"5.17.6+dfsg-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33227.json"}},{"package":{"name":"activemq","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/activemq?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.17.6+dfsg-1","5.17.6+dfsg-2"],"ecosystem_specific":{"binaries":[{"binary_version":"5.17.6+dfsg-2","binary_name":"activemq"},{"binary_name":"libactivemq-java","binary_version":"5.17.6+dfsg-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33227.json"}},{"package":{"name":"activemq","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/activemq?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.17.6+dfsg-2"],"ecosystem_specific":{"binaries":[{"binary_version":"5.17.6+dfsg-2","binary_name":"activemq"},{"binary_version":"5.17.6+dfsg-2","binary_name":"libactivemq-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33227.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}