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CVE-2026-15565 Undertow: undertow-websockets: undertow: pre-auth dos on websocket endpoint with @serverendpoint class with any @onmessage method

🗓️ 11 Aug 2026 08:49:58Reported by redhatType 
vulnrichment
 vulnrichment
🔗 github.com👁 8 Views

Undertow allows unauthenticated OOM DoS via WebSocket endpoint with any @OnMessage method.

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17 Sep 2026 23:29Current
5.4Medium risk
Vulners AI Score5.4
CVSS 3.17.5
EPSS0.0051
SSVC
8