Uncaught Exception Affecting github.com/nats-io/nats-server/v2/server package, versions <2.12.12>=2.14.0-RC.1 <2.14.3
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMNATSIONATSSERVERV2SERVER-17900613
- published9 Jul 2026
- disclosed8 Jul 2026
- creditUnknown
Introduced: 8 Jul 2026
CVE-2026-58208 Â (opens in a new tab)How to fix?
Upgrade github.com/nats-io/nats-server/v2/server to version 2.12.12, 2.14.3 or higher.
Overview
github.com/nats-io/nats-server/v2/server is an A simple, secure and performant communications system for digital systems, services and devices.
Affected versions of this package are vulnerable to Uncaught Exception in the WebSocket listener routing, which dispatches requests for the MQTT-over-WebSocket path into MQTT handling even when MQTT is not configured. An attacker can crash the server and cause denial of service by connecting to the WebSocket listener and requesting the MQTT-over-WebSocket path, which reaches uninitialized MQTT state. Exploitation affects only deployments that enable the WebSocket listener while leaving MQTT disabled.