CVE WatchSep 9, 2026

CVE-2026-33216

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 MQ

CVSS

8.6

High

EPSS

0.7%

p51

KEV

—

Exploit Today

0-100

Published: Mar 25, 2026 · Last modified: Sep 9, 2026 · CWE-256 · CWE-213

EPSS · 30d

0.6%EPSS · 30 days0.7%

2026-09-242026-10-22

Technical 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.

Official references

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