Go before 1.13.13 and 1.14.x before 1.14.5 has a data race in some net/http servers, as demonstrated by the httputil.ReverseProxy Handler, because it reads a request body and writes a response at the same time.
Go through 1.12.5 on Windows mishandles process creation with a nil environment in conjunction with a non-nil token, which allows attackers to obtain sensitive information or gain privileges.