http-proxy-middleware `router` host+path substring matching allows Host-header-driven backend routing bypass

{
                    "vendor": "chimurai",
                    "product": "http-proxy-middleware",
                    "versions": [
                        {
                            "version": ">= 4.0.0, < 4.1.0",
                            "status": "affected"
                        },
                        {
                            "version": ">= 3.0.0, < 3.0.6",
                            "status": "affected"
                        },
                        {
                            "version": ">= 0.16.0, < 2.0.10",
                            "status": "affected"
                        }
                    ]
                }