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Vulnerability · Published Sep 28, 2026 · Assigned by redhat

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

High 8.2

In plain English

A high-severity security flaw in Red Hat AMQ Broker 7 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities).

Severity (CVSS 3.1)8.2High
Exploit odds (30 days)0.5%top 55.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat JBoss Enterprise Application Platform 7.4.25 see references
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 see references
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 see references
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 see references
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 see references
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 see references
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 see references
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 see references
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 see references
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 see references
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 see references
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 see references
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 see references
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 see references
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 see references
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 see references
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 see references
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 see references
Red Hat Red Hat AMQ Broker 7 see references

Weakness: CWE-470 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

References