# SSRF: fetching a URL grants network capability

https://thiago.limaesilvatecnologia.com.br/en/artigos/ssrf-fetch-service/

Published: 2026-09-12

The feature needs destination and behavior boundaries.

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Reading-path month: August 2026

Collection published on September 12, 2026. Months organize the reading path; they are not earlier publication dates.

A short architecture article. The technical reference supports the topic; hypothetical scenarios and assessment proposals are editorial analysis, not accounts of personal implementations.

## The architecture decision

URL import turns an application into a client of other services. Review reachable destinations and the identity used.

## Practical application

Editorial proposal: define legitimate use before allowing arbitrary destinations. For a hypothetical importer, specify necessary source types, redirects and response limits. Confirm implementation-specific controls in documentation.

## How to verify

Test allowed and forbidden destinations in an isolated authorized environment, including destination changes during requests. Demonstrate that import convenience does not create general access to internal resources or unrelated operations.

## Sources

- [OWASP — Server Side Request Forgery Prevention Cheat Sheet](https://cheatsheetseries.owasp.org/cheatsheets/Server_Side_Request_Forgery_Prevention_Cheat_Sheet.html). Accessed: 2026-09-12.

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