5 Cloudflare
In February, content delivery network Cloudflare announced that its servers had suffered a breach that exposed sensitive and private data such as HTTP cookies, authentication tokens and login information. Not only was the data leaked, but it was also cached by search engines — adding to its severity.
The breach, later dubbed “Cloudbleed,” was the result of a software bug, according to a lengthy blog post by Cloudflare. And it potentially affected thousands of popular websites and services that use Cloudflare’s performance and security platforms, including Uber, OKCupid, Fitbit, Medium and more.