Apache Artemis CORE Protocol Topology Disclosure 2.50.0-2.57.0
CVE-2026-49363 Published on September 10, 2026
Apache Artemis, Apache ActiveMQ Artemis: Pre-Authentication Information Disclosure in CORE Protocol Topology Subscription
An unauthenticated remote attacker connecting with the CORE protocol can discover cluster node details by sending a SUBSCRIBE_TOPOLOGY request prior to authentication.
This issue affects Apache Artemis: from 2.50.0 through 2.56.0; Apache ActiveMQ Artemis: from 1.0.0 through 2.44.0.
Users are recommended to upgrade to version 2.57.0, which fixes the issue.
Weakness Type
Missing Authentication for Critical Function
The software does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
Products Associated with CVE-2026-49363
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Affected Versions
Apache Software Foundation Apache Artemis:- Version 2.50.0, <= 2.56.0 is affected.
- Version 1.0.0, <= 2.44.0 is affected.