This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-58208 →
DEBIAN-CVE-2026-58208
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 co...
Original description
The description as published by the source.
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.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Debian:12
nats-server
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:13
nats-server
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:14
nats-server
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.14.3-1"}]}]
References
- advisory security-tracker.debian.org