Bug 2451021 (CVE-2026-33215) - CVE-2026-33215 nats-server: NATS-Server: Session and message hijacking via MQTT Client ID malfeasance
Summary: CVE-2026-33215 nats-server: NATS-Server: Session and message hijacking via MQ...
Keywords:
Status: NEW
Alias: CVE-2026-33215
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2451151
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-24 22:01 UTC by OSIDB Bzimport
Modified: 2026-03-30 18:22 UTC (History)
5 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-03-24 22:01:43 UTC 
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.
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