[WIP] Sec-Fetch-* based Antiforgery Version-2#66411
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DeagleGross wants to merge 3 commits intodotnet:mainfrom
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[WIP] Sec-Fetch-* based Antiforgery Version-2#66411DeagleGross wants to merge 3 commits intodotnet:mainfrom
DeagleGross wants to merge 3 commits intodotnet:mainfrom
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Lightweight, auto-enabled cross-origin request protection that works without AddAntiforgery()/UseAntiforgery() and has no DataProtection dependency — AOT/trim safe. Architecture: - ICrossOriginProtection + CrossOriginValidationResult in Http.Abstractions (namespace Microsoft.AspNetCore.Antiforgery for discoverability) - CrossOriginRequestValidator as shared source in src/Shared/ (compiled into Routing now, Antiforgery later) - CrossOriginProtectionOptions + DefaultCrossOriginProtection in Routing - EndpointMiddleware uses ICrossOriginProtection.Validate() with tri-state result (Allowed/Denied/Disabled) instead of throwing on missing middleware Algorithm (matches Go 1.25 CrossOriginProtection): 1. Safe methods (GET/HEAD/OPTIONS/TRACE) → allow 2. Trusted origins → allow 3. Sec-Fetch-Site same-origin/none → allow, cross-site → deny 4. Origin vs request host fallback 5. No headers (non-browser) → allow Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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[IN DESIGN]
Fixes #65127