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Uncaught Exception

CVE-2026-58208

High
7.5/10

Summary

NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.12.12 and 2.14.x prior to 2.14.3, 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.

  • LOW
  • NETWORK
  • NONE
  • UNCHANGED
  • NONE
  • NONE
  • NONE
  • HIGH

CWE-248 - Uncaught Exception

An exception is thrown from a function, but it is not caught.

References

Advisory Timeline

  • Published