{"id":"CVE-2026-53917","aliases":["BIT-activemq-2026-53917","GHSA-f77w-px59-cqf5"],"url":"https://o3.security/vulnerability/CVE-2026-53917","summary":"Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker: Unbounded memory allocation in OpenWire property unmarshalling","details":"Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker.\n\nAn authenticated user can cause a broker DoS by sending a crafted OpenWire Message with a large encoded size value for the map. OpenWire message property maps are unmarshaled without size validation which can trigger OOM and crash the broker.\nThis issue affects Apache ActiveMQ: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ All: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ Client: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ Broker: before 5.19.8, from 6.0.0 before 6.2.7.\n\nUsers are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue.","published":"2026-06-30T09:49:17.388Z","modified":"2026-11-04T16:25:37.959330560Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.apache.activemq:apache-activemq","fixedVersion":"5.19.8"},{"ecosystem":"Maven","name":"org.apache.activemq:apache-activemq","fixedVersion":"6.2.7"},{"ecosystem":"Maven","name":"org.apache.activemq:activemq-all","fixedVersion":"5.19.8"},{"ecosystem":"Maven","name":"org.apache.activemq:activemq-all","fixedVersion":"6.2.7"},{"ecosystem":"Maven","name":"org.apache.activemq:activemq-client","fixedVersion":"5.19.8"},{"ecosystem":"Maven","name":"org.apache.activemq:activemq-client","fixedVersion":"6.2.7"},{"ecosystem":"Maven","name":"org.apache.activemq:activemq-broker","fixedVersion":"5.19.8"},{"ecosystem":"Maven","name":"org.apache.activemq:activemq-broker","fixedVersion":"6.2.7"}],"fix":{"url":"https://github.com/apache/activemq/pull/2136","label":"apache/activemq#2136"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/06/29/14"},{"type":"WEB","url":"https://repo.maven.apache.org/maven2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53917.json"},{"type":"ADVISORY","url":"https://lists.apache.org/thread/grrd1mwgkgblqjbwkkq6dvmdxd9ov2dx"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53917"},{"type":"WEB","url":"https://github.com/apache/activemq/pull/2136"},{"type":"WEB","url":"https://github.com/apache/activemq/commit/78bb8dcdc32e80c8b8813b57f89147572d16a2b9"},{"type":"WEB","url":"https://github.com/apache/activemq/commit/b20e61c7ef736a04ad07a934ea8de628550c6cf2"},{"type":"WEB","url":"https://github.com/apache/activemq/commit/ecfd1336fa3f3f6116a78f0ab71d1b2f90bc717f"},{"type":"PACKAGE","url":"https://github.com/apache/activemq"},{"type":"WEB","url":"https://github.com/apache/activemq/releases/tag/activemq-5.19.8"},{"type":"WEB","url":"https://github.com/apache/activemq/releases/tag/activemq-6.2.7"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-11-04T16:25:37.959330560Z"}}