Clone repo and run
npm audit
See npm issue 1486
Denial of Service vulnerability in @vue/cli-service > webpack-dev-server > http-proxy-middleware > http-proxy
"All versions of http-proxy are vulnerable to Denial of Service. An HTTP request with a long body triggers an ERR_HTTP_HEADERS_SENT unhandled exception that crashes the proxy server. This is only possible when the proxy server sets headers in the proxy request using the proxyReq.setHeader function."
"No fix is currently available. Consider using an alternative package until a fix is made available."