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Vulnerabilities CVE-2026-33216

CVE-2026-33216

High
Open
TLP:CLEAR

NATS has MQTT plaintext password disclosure

NVD CVE.org
Critical Infrastructure

AI Analysis

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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.

Details

CVSS Score
8.6
EPSS Score
0.37%

29.5th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Confidence
90%
Published
Mar 25, 2026
Last Modified
Aug 10, 2026
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