CVE-2026-49363 PUBLISHED

Apache Artemis, Apache ActiveMQ Artemis: Pre-Authentication Information Disclosure in CORE Protocol Topology Subscription

Assigner: apache
Reserved: 29.05.2026 Published: 10.09.2026 Updated: 10.09.2026

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.

Product Status

Vendor Apache Software Foundation
Product Apache Artemis
Versions Default: unaffected
  • affected from 2.50.0 to 2.56.0 (incl.)
Vendor Apache Software Foundation
Product Apache ActiveMQ Artemis
Versions Default: unaffected
  • affected from 1.0.0 to 2.44.0 (incl.)

Credits

  • Domenico Francesco Bruscino finder

References

Problem Types

  • CWE-306 Missing authentication for critical function CWE