NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system.

Code

The project this record applies to. Exploit listings stay in References.

• Repository · github.com

Timeline

Detection, updates, and resolution for this record.

1. Mar 24, 2026 · NIST NVD

   Detected

   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.

2. Jun 17, 2026 · NIST NVD

   Updated

   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

• cpe linuxfoundation/nats-serverversion unspecified

Sources

• CVE.orgVulnerability recordCVE-2026-33215

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-2026-33215

  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

  nvd.nist.gov

References

• Broken Link · advisories.nats.io
• Vendor Advisory · github.com