diff --git a/routers/common/middleware.go b/routers/common/middleware.go
index 4f9d43c362182..2765577b021ea 100644
--- a/routers/common/middleware.go
+++ b/routers/common/middleware.go
@@ -16,6 +16,7 @@ import (
 	"code.gitea.io/gitea/modules/web/routing"
 
 	"github.com/chi-middleware/proxy"
+	"github.com/go-chi/chi/v5"
 	"github.com/go-chi/chi/v5/middleware"
 )
 
@@ -50,6 +51,27 @@ func Middlewares() []func(http.Handler) http.Handler {
 
 	handlers = append(handlers, middleware.StripSlashes)
 
+	handlers = append(handlers, func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
+			var path string
+			rctx := chi.RouteContext(req.Context())
+			if rctx != nil && rctx.RoutePath != "" {
+				path = rctx.RoutePath
+			} else {
+				path = req.URL.Path
+			}
+			if len(path) > 1 && strings.HasPrefix(path, "//") {
+				newPath := path[1:]
+				if rctx == nil {
+					req.URL.Path = newPath
+				} else {
+					rctx.RoutePath = newPath
+				}
+			}
+			next.ServeHTTP(resp, req)
+		})
+	})
+
 	if !setting.Log.DisableRouterLog {
 		handlers = append(handlers, routing.NewLoggerHandler())
 	}