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CVE-2026-101292 - Artemis-core-client: unsafe reflection in apache activemq artemis federation message deserialization

CVE ID :CVE-2026-101292
Published : Sept. 28, 2026, 12:44 p.m. | 27 minutes ago
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 () and no-argument constructors (()) 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.
Severity: 8.2 | HIGH
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