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Message-ID: <5ee7cac3-e816-e6d4-dff5-ab87e00223dc@apache.org>
Date: Wed, 09 Sep 2026 20:23:33 +0000
From: Clebert Suconic <clebertsuconic@...che.org>
To: oss-security@...ts.openwall.com
Subject: CVE-2026-49363: Apache Artemis, Apache ActiveMQ Artemis:
Pre-Authentication Information Disclosure in CORE Protocol Topology
Subscription
Severity: moderate
Affected versions:
- Apache Artemis (org.apache.artemis:artemis-server) 2.50.0 through 2.56.0
- Apache ActiveMQ Artemis (org.apache.activemq:artemis-server) 1.0.0 through 2.44.0
Description:
An unauthenticated remote attacker connecting with the CORE protocol can discover cluster node details by sending a SUBSCRIBE_TOPOLOGY request prior to authentication.
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.
Credit:
Domenico Francesco Bruscino (finder)
References:
https://artemis.apache.org
https://www.cve.org/CVERecord?id=CVE-2026-49363
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