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CVE-2026-33216

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CVE-2026-33216

Published: Mar 25, 2026

Modified: Mar 28, 2026

PUBLISHED

CVSS v3.1

8.6

HIGH

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.

VendorProductVersions

nats-io

nats-server

affected
< 2.11.15
affected
>= 2.12.0-RC.1, < 2.12.6

Weaknesses (CWE)

CWE-256

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

References

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