Twitch.TV misconfigured cache-server exposes user data

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Twitch.TV recently released an announcement about their cache-server misconfiguration: "In order to improve service, we were working to change how our pages were cached. We worked with our partner web CDN to make these changes. Unfortunately, during the update process our caching ruleset was not obeyed by our CDN partner, and some pages that should not have been cached were cached after this update. If you were logged in during this time, there was a very slim possibility that your user-specific information, such as stream key and password hash, were exposed in these improperly cached pages."

Site Outage: Passwords and Stream Keys Reset | The Official Twitch Blog