Fix · Cloudflare
Fix “Content Security Policy (CSP)” on Cloudflare
Start with: Content-Security-Policy: default-src 'self'; object-src 'none'; base-uri 'self' -- then tighten.
// Transform Rules > Modify Response Header > Set static
// Content-Security-Policy = default-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'none'
Verify the fix
Re-run the Content Security Policy (CSP) check after deploying. Test config changes in staging first and keep a rollback: a wrong header can break a site faster than a missing one.
Other stacks: nginx · Apache · Caddy · Express / Node