Do Son 
Five important-severity Apache Artemis vulnerabilities affect protocol handling and core authentication mechanisms. These ActiveMQ Artemis flaws allow malicious actors to steal sessions, expose credentials, and execute denial of service attacks. Consequently, administrators must upgrade to version 2.57.0 to secure their message brokers.
Why This Threat Matters
Apache Artemis and ActiveMQ Artemis serve as critical messaging backbones for enterprise applications. Unauthenticated attackers can exploit these Apache Artemis vulnerabilities to disrupt essential communications. If threat actors access administrative credentials or steal sessions, they gain unauthorized control over broker states. This disruption causes significant downtime for dependent applications and prevents users from accessing critical services.
How the Attack Works
These flaws stem from missing authentication checks and improper protocol handling across the platform. For instance, attackers exploit CVE-2026-67593 by sending an Openwire RemoveSubscriptionInfo command. This action deletes a queue before the connection authentication stage.
Meanwhile, CVE-2026-57967 targets the CORE protocol. The advisory states, “An unauthenticated remote attacker can craft a CORE protocol SESSION_REATTACH packet to steal an existing session and assume ongoing execution of the previously authenticated session.” Similarly, CVE-2026-49362 allows attackers to create arbitrary durable queues without authentication.
Furthermore, CVE-2026-49364 exposes cluster administrative credentials during initial connection handshakes. Finally, CVE-2026-57822 involves Java deserialization. Authenticated users send specific management requests to trigger excessive computation. This action pins the processing thread and causes a denial of service.
Affected Versions
These ActiveMQ Artemis flaws impact a wide range of deployments. Specifically, they affect Apache Artemis versions 2.50.0 through 2.56.0. They also impact Apache ActiveMQ Artemis versions 1.0.0 through 2.44.0. Exact installation counts remain unverified, but the software is widely used in enterprise networks.
Patch and Mitigation Steps
Currently, researchers have not confirmed any active exploitation in the wild. Additionally, no public proof-of-concept exploits exist for these bugs. Administrators must deploy the official patches immediately. Upgrading to version 2.57.0 resolves all five issues. You can secure your systems by visiting the official download page.
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