CVE-2026-33215
MEDIUM WAF: Low
CVSS 6.5
Published: 2026-03-24
CWE-287
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.
WAF Coverage Analysis
Improper Authentication
Low WAF Coverage
OWASP: A07:2021 Identification and Authentication Failures
Affected Software
| Vendor | Product | Version |
|---|---|---|
| linuxfoundation | nats-server | 2.0.0 - 2.11.15 |
| linuxfoundation | nats-server | 2.12.0 - 2.12.5 |
References
- advisories.nats.io (Broken Link)
- github.com (Vendor Advisory)