Cross-Origin Resource Isolation
Cross-origin isolation headers (COEP, COOP, CORP) enable powerful features like SharedArrayBuffer while protecting against Spectre attacks.
Why It Matters
These headers protect against side-channel attacks like Spectre that can leak data across origins. They're required for certain high-performance APIs.
How We Check
We analyze Cross-Origin-Embedder-Policy, Cross-Origin-Opener-Policy, and Cross-Origin-Resource-Policy headers for proper configuration.
How to Fix
Add Cross-Origin-Embedder-Policy: require-corp, Cross-Origin-Opener-Policy: same-origin, and Cross-Origin-Resource-Policy: same-origin for full isolation.
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