CloudFlare Incident Caused Widespread Impact (July 17, 2020)


Beginning at 21:39 UTC (17:39 EDT) on July 17, 2020, a CloudFlare incident caused widespread impact to many Internet services and customer applications.

This appears to be materially resolved as of 22:09 UTC (18:09 EDT).


Heroku does not use CloudFlare for its services, but customer applications that use CloudFlare for DNS or CDN services may be impacted. In addition, apps that make API calls (client- or server-side) that are hosted on CloudFlare may see a cascading impact.

For details, please see

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