Security Advisory

CVE-2026-33217

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2026-03-25 19:43:40

Last updated 2026-03-25 20:08:22

Assigner GitHub_M

State PUBLISHED

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, when using ACLs on message subjects, these ACLs were not applied in the `$MQTT.>` namespace, allowing MQTT clients to bypass ACL checks for MQTT subjects. Versions 2.11.15 and 2.12.6 contain a fix. No known workarounds are available.

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