fix: omit CORS allow headers for disallowed origins#20
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Access-Control-Allow-Origin must not fall back to "*" when Origin is missing or rejected by the allowlist; browsers treat that as open CORS. Reflect the request Origin only when the validator permits it. Co-authored-by: Cursor <cursoragent@cursor.com>
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Summary
Access-Control-Allow-Origin: *whenOriginis missing or rejected by the allowlist validator.Test plan
./tools/CB.sh debug test --jsonl=failures --tags='\[net\]'(427/427)Made with Cursor