CVE-2026-49363

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.

  • Published Sep 10, 2026
  • CVSS 7.5 high
  • 0.8% chance of exploitation in the next 30 days (EPSS)
  • A fix is available

Affected software

CVE-2026-49363 at the National Vulnerability Database