CVE-2026-49364

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.

Score

CVSS 3.1 9.1 Critical

Status

Analyzed - security@apache.org

Published

2026-09-10

Last modified

2026-09-10

Weaknesses

CWE-306

Affected products

• Artemis (Apache)
• Apache Activemq Artemis (Apache Software Foundation)
• Apache Artemis (Apache Software Foundation)

References

• https://lists.apache.org/thread/4qbgcz3k38q30bfbf7hphtomrdc8l8n8
• http://www.openwall.com/lists/oss-security/2026/09/10/3