Bug 2499585

Summary:	CVE-2026-58208 golang-github-nats-io-streaming-server: NATS Server: Denial of Service due to incorrect MQTT-over-WebSocket request routing [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Jeremy Choi <jechoi>
Component:	golang-github-nats-io-streaming-server	Assignee:	Orphan Owner <extras-orphan>
Status:	NEW ---	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	45	CC:	extras-orphan, go-sig
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["02384de3-881f-4c02-83bd-062134cdcfe8"]}
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2498254

Description Jeremy Choi 2026-07-13 05:51:55 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, a WebSocket listener could route requests for the MQTT-over-WebSocket path into MQTT handling even when MQTT was not configured, allowing an unauthenticated client with access to the WebSocket listener to reach uninitialized MQTT state and crash the server process. This issue is fixed in versions 2.14.3 and 2.12.12.

Comment 1 Aoife Moloney 2026-08-17 15:18:42 UTC

This bug appears to have been reported against 'rawhide' during the Fedora Linux 45 development cycle.
Changing version to 45.