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NATS: Pre-auth remote server crash via WebSocket frame length overflow in wsRead

🗓️ 25 Mar 2026 17:07:51Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 4 Views

Unauthenticated attacker crashes nats-server with WebSocket frame due to length overflow.

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Vulners
Node
OR
nats-ionats-serverRange2.12.02.12.5go
OR
nats-ionats-serverRange2.2.02.11.14go

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27 Mar 2026 22:09Current
6.2Medium risk
Vulners AI Score6.2
CVSS 3.17.5
EPSS0.00094
SSVC
4