CVE-2026-49364

Apache Artemis, Apache Artemis, Apache ActiveMQ Artemis, Apache ActiveMQ Artemis: Pre-Authentication Cluster Credential Exposure to Discovered Peers

State: Published
Severity: 9.1 Critical
Published: Sep 10, 2026
Updated: Sep 10, 2026
Reserved: May 29, 2026

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Description

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.

Scores

CVSS	Score	Vector	Source
3.1	9.1 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N	CISA-ADP

Weaknesses

CWE-306 Missing authentication for critical function

Affected Products

Product	Versions
Apache ArtemisApache Software Foundation	2.50.0 through 2.56.0Affected
Apache ArtemisApache Software Foundation	2.50.0 through 2.56.0Affected
Apache ActiveMQ ArtemisApache Software Foundation	1.0.0 through 2.44.0Affected
Apache ActiveMQ ArtemisApache Software Foundation	1.0.0 through 2.44.0Affected

References

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