CRITICALFixed upstream

CVE-2026-49364

Apache Artemis exposes cluster credentials to discovered peers before authentication

Technology

ActiveMQ Artemis

CVSS Score

9.1 / 10.0

Affected Versions

Apache Artemis 2.50.0 to 2.56.0; Apache ActiveMQ Artemis 1.0.0 to 2.44.0

Upstream Fix

2.57.0

Published

September 10, 2026

OSSeva Coverage

Fixed upstream

Description

An unauthenticated, network-adjacent attacker can use cluster discovery to capture the cluster administrative credentials during the initial cluster connection handshake. The advisory covers artemis-server and artemis-core-client.

Upstream record: NVD · CVE.org

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