---
id: CVE-2026-101292
title: >-
  Apache ActiveMQ Artemis before 2.34.0 contains an unsafe reflection
  vulnerability in FederationStreamConnectMessage.getFederationPolicy()
summary: >-
  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 …
severity: high
cvss: 8.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H'
cwe:
  - CWE-470
vendor: Red Hat
product: artemis-core-client
affected:
  - artemis-core-client
  - artemis-core-client (all versions)
published: '2026-09-28'
updated: '2026-09-28'
sourceUpdated: '2026-09-28T13:17:21.267'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-101292'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2026:53644'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2026-101292'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2482963'
    label: secalert@redhat.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-28T13:10:25.501009Z'
ingestedAt: '2026-09-28T13:09:42.234Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.