CVE-2026-49364

Critical

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.

SeverityCritical

CVSS9.1

Exploit probability—

Product

Apache Artemis

PublishedSep 10, 2026

First seenSep 10, 2026

Weakness typeCWE-306Missing authentication for critical function

How to fix

Update

apache artemis2.44.0, 2.57.0 or later

Vendor advisories

lists.apache.org/thread/4qbgcz3k38q30bfbf7hphtomrdc8l8n8

Affected products

Product	Affected versions	Fixed in
apache artemis	1.0.0 ≤ v < 2.44.0, 2.50.0 ≤ v < 2.57.0	2.44.0, 2.57.0

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