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Security Advisories

CVE-2026-33216

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-33216

Severity

8.6

High

CVSS V3

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Summary

NATS has MQTT plaintext password disclosure

Description

NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, for MQTT deployments using usercodes/passwords: MQTT passwords are incorrectly classified as a non-authenticating identity statement (JWT) and exposed via monitoring endpoints. Versions 2.11.14 and 2.12.6 contain a fix. As a workaround, ensure monitoring end-points are adequately secured. Best practice remains to not expose the monitoring endpoint to the Internet or other untrusted network users.

References

Affected packages

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