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.
History

Wed, 25 Mar 2026 13:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 25 Mar 2026 12:00:00 +0000

Type Values Removed Values Added
First Time appeared Nats
Nats nats Server
Vendors & Products Nats
Nats nats Server

Tue, 24 Mar 2026 21:15:00 +0000

Type Values Removed Values Added
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.
Title NATS is vulnerable to MQTT hijacking via Client ID
Weaknesses CWE-287
CWE-488
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-03-24T20:55:53.455Z

Updated: 2026-03-25T13:05:12.279Z

Reserved: 2026-03-17T23:23:58.314Z

Link: CVE-2026-33215

cve-icon Vulnrichment

Updated: 2026-03-25T13:05:05.816Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-03-24T21:16:28.640

Modified: 2026-03-25T15:41:58.280

Link: CVE-2026-33215

cve-icon Redhat

No data.