Cache Key Mismatch Observation in Reverse Proxy Rules
Quick note documenting a cache poisoning condition caused by query normalization mismatch between CDN and origin cache layers.
Summary
Observed a split behavior where the CDN normalized query parameters before caching, while the origin cache treated parameter ordering as unique.
Observation
Requests with reordered query parameters could populate a shared CDN key while mapping to distinct origin responses.
/api/profile?user=42&view=full
/api/profile?view=full&user=42Worth testing for response confusion and cache poisoning in authenticated edge cases.