Major websites around the world are either completely down or not loading properly in a global outage. Amazon Web Services, CNN, GitHub and GitHub among those affected. Fastly CDN pins the outage on a software bug in how configuration changes are handled. In a post-mortem report, Fastly stated that the issue had occurred due to an undiscovered software bug that surfaced on June 8 when it was triggered by a valid customer configuration change, says Nick Rockwell, Senior Vice President of Engineering and Infrastructure, in Fastly’s report.
Source: https://www.bleepingcomputer.com/news/security/stackoverflow-twitch-reddit-others-down-in-fastly-cdn-outage/