CVE-2026-33215

Summary

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 Software

VendorProductVersion RangeStatus
nats-ionats-server< 2.11.15affected
nats-ionats-server>= 2.12.0-RC.1, < 2.12.6affected

Weaknesses

  • CWE-287: CWE-287: Improper Authentication
  • CWE-488: CWE-488: Exposure of Data Element to Wrong Session

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References