CVE-2026-101292

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

publishedCWE-470

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.

Technical severity8.2 highCVSS 3.1 · CNA: redhat

Published2026-09-28Source updated 2026-11-03

Collected2026-11-032 attributed sources

Fixes and workarounds

Workaround

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability. For JBoss EAP 7.4, update to EAP 7.4.25 or later, which contains the fix delivered through RHSA-2026:53644.

Source: CNA: redhat

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
Red Hat JBoss Enterprise Application Platform 7.4.25 Red Hat `artemis-core-client` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Red Hat `eap7-activemq-artemis` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.16.0-22.redhat_00057.1.el7eap; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Red Hat `eap7-glassfish-jsf` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.3.14-11.SP11_redhat_00001.1.el7eap; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Red Hat `eap7-ironjacamar` https://access.redhat.com/downloads/content/package-browser/	≥ 0:1.5.26-2.Final_redhat_00001.1.el7eap; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Red Hat `eap7-jackson-annotations` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.18.8-1.redhat_00003.1.el7eap; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Red Hat `eap7-jackson-core` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.18.8-1.redhat_00003.1.el7eap; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Red Hat `eap7-jackson-databind` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.18.8-1.redhat_00003.1.el7eap; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Red Hat `eap7-jackson-jaxrs-providers` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.18.8-1.redhat_00003.1.el7eap; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Red Hat `eap7-jackson-modules-base` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.18.8-1.redhat_00003.1.el7eap; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Red Hat `eap7-jackson-modules-java8` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.18.8-1.redhat_00003.1.el7eap; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Red Hat `eap7-jboss-remoting` https://access.redhat.com/downloads/content/package-browser/	≥ 0:5.0.31-3.SP2_redhat_00001.1.el7eap; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Red Hat `eap7-jboss-server-migration` https://access.redhat.com/downloads/content/package-browser/	≥ 0:1.10.0-46.Final_redhat_00044.1.el7eap; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Red Hat `eap7-netty` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.1.135-1.Final_redhat_00001.1.el7eap; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Red Hat `eap7-netty-transport-native-epoll` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.1.135-1.Final_redhat_00001.1.el7eap; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Red Hat `eap7-picketlink-bindings` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.5.5-30.SP12_redhat_00020.1.el7eap; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Red Hat `eap7-picketlink-federation` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.5.5-24.SP12_redhat_00016.1.el7eap; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Red Hat `eap7-undertow` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.2.40-2.SP3_redhat_00001.1.el7eap; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Red Hat `eap7-wildfly` https://access.redhat.com/downloads/content/package-browser/	≥ 0:7.4.25-2.GA_redhat_00001.1.el7eap; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat AMQ Broker 7 Red Hat `artemis-core-client` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
3.1 / 8.2 high	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H`	CNA: redhat

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

https://access.redhat.com/errata/RHSA-2026:53644CNA: redhat · technical-description, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:53806CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-101292CNA: redhat · vdb-entry, x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2482963CNA: redhat · issue-tracking, x_refsource_REDHAT

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