VULNERABILITY INTELLIGENCE

CVE-2026-33217

CVSS score7.1 HIGH
EPSS probability0.26%
CISA KEVNot currently listed
Published2026-03-25
Last modified2026-09-09
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N

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.

Weakness classification

  • security-advisories@github.com: CWE-863
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-425

Primary references