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Security headers › Cross-Origin-Resource-Policy

How to add the Cross-Origin-Resource-Policy header in Cloudflare

CORP lets you say which origins may load your resources, such as images and scripts.

Cloudflare configuration (Transform Rules)

Rules > Transform Rules > Modify Response Header
Action: Set static
Header name: Cross-Origin-Resource-Policy
Value: same-origin

Create the rule for your hostname in the Cloudflare dashboard. For HSTS, Cloudflare also has a dedicated setting under SSL/TLS > Edge Certificates. On Cloudflare Pages you can use a _headers file instead.

Before you deploy

Use same-site or cross-origin for assets that other sites or your CDN subdomains legitimately load.

Verify it works

curl -sI https://your-site.com | grep -i cross-origin-resource-policy

Or run a free Korrali Web scan to check this and every other security header at once.

Scan your site free

Other headers in Cloudflare