Versions of the package http-proxy-middleware before 2.0.7, from 3.0.0 and before 3.0.3 are vulnerable to Denial of Service (DoS) due to an UnhandledPromiseRejection error thrown by micromatch. An attacker could kill the Node.js process and crash the server by making requests to certain paths.
https://security.snyk.io/vuln/SNYK-JS-HTTPPROXYMIDDLEWARE-8229906
https://github.com/chimurai/http-proxy-middleware/commit/788b21e4aff38332d6319557d4a5b1b13b1f9a22
https://github.com/chimurai/http-proxy-middleware/commit/0b4274e8cc9e9a2c5a06f35fbf456ccfcebc55a5
https://gist.github.com/mhassan1/28be67266d82a53708ed59ce5dc3c94a