Polyfill.io, BootCDN, Bootcss, Staticfile attack traced to 1 operator

The recent large scale supply chain attack conducted via multiple CDNs, namely Polyfill.io, BootCDN, Bootcss, and Staticfile that affected up to tens of millions of websites has been traced to a common operator. Researchers discovered a public GitHub repository with leaked API keys helping them draw a conclusion.