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CVE PROGRAM SOURCE RECORD6.5 Medium

CVE-2026-33215

NATS is vulnerable to MQTT hijacking via Client ID

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Status
Published
Published
Updated
Assigning organization
GitHub_M

Description

NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. The nats-server provides an MQTT client interface. Prior to versions 2.11.15 and 2.12.5, Sessions and Messages can by hijacked via MQTT Client ID malfeasance. Versions 2.11.15 and 2.12.5 patch the issue. No known workarounds are available.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

nats-io nats-server

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

References