Individual skill
dns-rebinding-attacks
DNS rebinding attack playbook. Use when testing applications that trust DNS resolution for origin checks, interact with internal services from browser context, or when SSRF is not possible server-side but the target has client-side fetch/XHR to attacker-controlled domains.
skills/dns-rebinding-attacks/SKILL.md
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- Last checked
- Nov 2, 2026
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- Sep 13, 2026
- License
- MIT
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# SKILL: DNS Rebinding — Expert Attack Playbook
> **AI LOAD INSTRUCTION**: Expert DNS rebinding techniques for bypassing same-origin policy via DNS manipulation. Covers TTL tricks, browser cache bypasses, attack variants (HTTP, WebSocket, TOCTOU), internal service targeting, and tool usage. Base models confuse DNS rebinding with SSRF — this skill clarifies the client-side nature and unique exploit paths.
## 0. RELATED ROUTING
- [ssrf-server-side-request-forgery](../ssrf-server-side-request-forgery/SKILL.md) — server-side variant; DNS rebinding is the **client-side** counterpart
- [cors-cross-origin-misconfiguration](../cors-cross-origin-misconfiguration/SKILL.md) — when CORS misconfig allows direct cross-origin reads instead
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## 1. CORE PRINCIPLE
The browser same-origin policy binds `protocol + host + port`. The **host** is resolved via DNS at connection time. If an attacker controls the DNS server for `attacker.com`, they can: