Bug 2499585 - CVE-2026-58208 golang-github-nats-io-streaming-server: NATS Server: Denial of Service due to incorrect MQTT-over-WebSocket request routing [fedora-all]
Summary: CVE-2026-58208 golang-github-nats-io-streaming-server: NATS Server: Denial of...
Keywords:
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: golang-github-nats-io-streaming-server
Version: 45
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Orphan Owner
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["02384de3-881f-4c02-83bd-0...
Depends On:
Blocks: CVE-2026-58208
TreeView+ depends on / blocked
 
Reported: 2026-07-13 05:51 UTC by Jeremy Choi
Modified: 2026-08-17 15:18 UTC (History)
2 users (show)

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

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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.
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