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.
Scores
CVSS v3
6.5
EPSS
0.0002
EPSS Percentile
3.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-287
CWE-488
Status
published
Products (4)
linuxfoundation/nats-server
2.0.0 - 2.11.15
nats-io/nats-server
0 - 2.11.15Go
nats-io/nats-server
< 2.11.15
nats-io/nats-server
>= 2.12.0-RC.1, < 2.12.6
Published
Mar 24, 2026
Tracked Since
Mar 25, 2026