Bug 2492627 (CVE-2026-49363) - CVE-2026-49363 artemis-server: artemis-server: Pre-auth topology disclosure via CORE SUBSCRIBE_TOPOLOGY_V2 on channel0
Summary: CVE-2026-49363 artemis-server: artemis-server: Pre-auth topology disclosure v...
Keywords:
Status: NEW
Alias: CVE-2026-49363
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-25 04:37 UTC by OSIDB Bzimport
Modified: 2026-09-10 23:24 UTC (History)
33 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:66488 0 None None None 2026-09-10 16:36:51 UTC
Red Hat Product Errata RHSA-2026:66545 0 None None None 2026-09-10 23:24:51 UTC

Description OSIDB Bzimport 2026-06-25 04:37:29 UTC 
Pre-auth topology disclosure via Artemis CORE SUBSCRIBE_TOPOLOGY_V2 on channel0. CoreProtocolManager.LocalChannelHandler.handlePacket() processes topology subscriptions with zero authentication -- no getSecurityStore(), no subject validation. Contrasts with federation handler fixed via ARTEMIS-5928 (CVE-2026-27446).

Vulnerable class: org.apache.activemq.artemis.core.protocol.core.impl.CoreProtocolManager
- https://github.com/apache/activemq-artemis/blob/2.16.0/artemis-server/src/main/java/org/apache/activemq/artemis/core/protocol/core/impl/CoreProtocolManager.java
- https://github.com/apache/activemq-artemis/blob/2.52.0/artemis-server/src/main/java/org/apache/activemq/artemis/core/protocol/core/impl/CoreProtocolManager.java

Affected: All Artemis versions (2.16.0 through 2.52.0 and main)
Fixed: No upstream fix available

Related (different issue): CVE-2026-27446 (federation handler auth bypass only, fixed via ARTEMIS-5928)
Comment 1 errata-xmlrpc 2026-09-10 16:36:49 UTC 
This issue has been addressed in the following products:

  Red Hat AMQ Broker 7.14.1

Via RHSA-2026:66488 https://access.redhat.com/errata/RHSA-2026:66488
Comment 2 errata-xmlrpc 2026-09-10 23:24:48 UTC 
This issue has been addressed in the following products:

  Red Hat AMQ Broker 7.13.6

Via RHSA-2026:66545 https://access.redhat.com/errata/RHSA-2026:66545
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