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NATS is vulnerable to MQTT hijacking via Client ID

🗓️ 24 Mar 2026 21:39:52Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 4 Views

NATS sessions and messages can be hijacked via MQTT Client ID in versions before v2.12.6 or v2.11.15.

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Detection
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Vulners
Node
nats-ionats-serverRange2.12.0-RC.12.12.6go
OR
nats-ionats-serverRange<2.11.15go

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27 Mar 2026 20:55Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.16.5
EPSS0.0024
SSVC
4