CVE-2026-49363: Apache Artemis

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

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.

Affected products

• Apache Artemis: from 1.0.0, before 2.44.0 (fixed in 2.44.0); from 2.50.0, before 2.57.0 (fixed in 2.57.0)

Published 2026-09-10. Last modified 2026-09-16.