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defensive-ssrf

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Defend server fetches from SSRF threats.

Software Engineering#security#ssrf#dns-rebinding#cloud-metadata#server-side-fetch#safeFetch
AuthorRideMatch1
Version1.0.0
Installs0

System Documentation

What problem does it solve?

Server-side fetches that rely on user input can be manipulated to reach internal networks or cloud metadata endpoints. This Skill provides a structured SSRF defense pattern that validates the destination IP before making outbound requests and pins the resolution to defeat DNS rebinding.

Core Features & Use Cases

  • SSRF-safe fetch primitive (safeFetch) that validates hostname/IP and pins resolution for the actual fetch.
  • Protocol and IP-range enforcement (http/https only; block private, loopback, link-local, metadata endpoints, and cloud metadata).
  • Guidance for hardening server endpoints like image proxies, webhooks, and OAuth callbacks, and remediation patterns for ssrf-checker findings.

Quick Start

Use the SSRF defense pattern by wrapping outbound fetch calls with safeFetch and enabling strict IP/host validation.

Dependency Matrix

Required Modules

None required

Components

Standard package

💻 Claude Code Installation

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Please help me install this Skill:
Name: defensive-ssrf
Download link: https://github.com/RideMatch1/a.e.g.i.s/archive/main.zip#defensive-ssrf

Please download this .zip file, extract it, and install it in the .claude/skills/ directory.
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