Detections
Analytics
CVE-2026-33217
medium
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.
References
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33217.json
https://github.com/nats-io/nats-server/security/advisories/GHSA-jxxm-27vp-c3m5
https://bugzilla.redhat.com/show_bug.cgi?id=2451446
https://advisories.nats.io/CVE/secnote-2026-07.txt
https://access.redhat.com/security/cve/CVE-2026-33217
https://access.redhat.com/errata/RHSA-2026:23345