{"id":"CVE-2026-101292","published":"2026-09-28T13:17:21.267","lastModified":"2026-09-29T21:29:07.663","description":"Apache ActiveMQ Artemis before 2.34.0 contains an unsafe reflection vulnerability in FederationStreamConnectMessage.getFederationPolicy(). The method calls Class.forName(clazz).getConstructor().newInstance() where clazz is read directly from the CORE protocol wire buffer without type validation. An authenticated federation peer can send a FEDERATION_DOWNSTREAM_CONNECT packet with a crafted class name, causing the broker to load and instantiate arbitrary classes visible to the Artemis module classloader. Static initializers (<clinit>) and no-argument constructors (<init>()) execute as side effects before the type cast, enabling denial of service via system-property poisoning, out-of-memory conditions via classloading, or broker state manipulation.","cvssScore":8.2,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","cwes":["CWE-470"],"vendors":[],"products":[],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:53644","tags":[]},{"url":"https://access.redhat.com/errata/RHSA-2026:53806","tags":[]},{"url":"https://access.redhat.com/security/cve/CVE-2026-101292","tags":[]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2482963","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}