If a webapp sends Cache-Control: private
it shouldn't be cached for example with nginx proxy_cache
. What could happen if it was cached anyhow? Could another visitor see the personalized login of another user? Might another visitor then being logged in as another user?
-
That will depend on how it was cached and what access to the cache other clients would have. – schroeder♦ Jun 20 '20 at 15:22