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websocket-security

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WebSocket handshake, CSWSH, tooling (wsrepl, ws-harness, Burp), and common flaws. Use when apps use real-time channels, chat, notifications, or WS-backed APIs.

knowledge/hack-skills/skills/websocket-security/SKILL.md

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Nov 5, 2026
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Apache-2.0

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# SKILL: WebSocket Security

> **AI LOAD INSTRUCTION**: This skill covers WebSocket protocol basics, cross-site WebSocket hijacking (CSWSH), practical tooling bridges, and common vulnerability classes. Apply only in **authorized** tests; treat tokens and message content as sensitive. For REST/GraphQL companion testing, cross-load **[api-sec](../api-sec/SKILL.md)** when present in the workspace.

## 0. QUICK START

During proxy or raw traffic review, watch for:

```http
Upgrade: websocket
Connection: Upgrade
Sec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ==
Sec-WebSocket-Version: 13
Sec-WebSocket-Protocol: optional-subprotocol
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