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

CSP: treat adoption as a dependency migration

A sustainable policy needs script owners.

AppSec

Content produced with AI assistance for Thiago Silva’s website. Independent editorial analysis; it does not represent clients or employers.

Reading context

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

Original source ↗

The architecture decision

Adding a restrictive policy without understanding scripts can break functionality. Broadly allowing origins to fix it may undermine the original intent. The decision must involve product owners and suppliers.

Practical application

Editorial proposal: inventory scripts by function, origin and owner. In a hypothetical checkout, distinguish payments, measurement and support. Plan each dependency's removal or adaptation before moving from observation to enforcement.

How to verify

Choose a critical journey to monitor and a time-limited rollback. Violation reports are investigation signals, not automatic proof of attack. Aim for a policy the team understands, with justified and reviewable exceptions.

Sources

  1. OWASP — Content Security Policy Cheat Sheet