CVE-2026-49364: Apache Artemis

Critical severity, CVSS 9.1. EPSS: 0.6% chance of exploitation in the next 30 days.

An unauthenticated network-adjacent attacker can leverage discovery to capture cluster administrative credentials during the initial cluster connection handshake. 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.