Skip to main content
Shopify fix guide

Cross-Origin Isolation Headers Not Configured on Shopify

One or more cross-origin isolation headers (COOP, COEP, CORP) are not set. These headers provide defense-in-depth but are only required if your site uses features like SharedArrayBuffer or needs strict cross-origin isolation.

Issue ID: SEC-CROSS-ORIGIN-ISOLATION-001Severity: advisoryEffort: S

Why this matters

One or more cross-origin isolation headers (COOP, COEP, CORP) are not set. These headers provide defense-in-depth but are only required if your site uses features like SharedArrayBuffer or needs strict cross-origin isolation. This affects browser trust signals and whether visitors feel safe submitting contact details.

Shopify fix path

How to fix this on Shopify

Use theme settings, page settings, or theme code.

  1. 1Find the source of the issue in Shopify admin.
  2. 2Apply the change.
  3. 3Preview and publish.

After you fix it

  • ✓Confirm all three cross-origin headers are present in response headers

Same fix, other platforms

Fix cross-origin isolation headers not configured on a different CMS

Other fixes

More Shopify fixes

Parents

Related guides

See every Shopify issue on your site

This is one issue of many the full audit checks. Run a free scan to see what else might be holding your site back.

Run Free Audit