diff --git a/web/web.go b/web/web.go
index f2bc59fd..3a1a33b0 100644
--- a/web/web.go
+++ b/web/web.go
@@ -266,6 +266,11 @@ func (s *Server) initRouter() (*gin.Engine, error) {
 	s.panel = controller.NewXUIController(g)
 	s.api = controller.NewAPIController(g)
 
+	// Add a catch-all route to handle undefined paths and return 404
+	engine.NoRoute(func(c *gin.Context) {
+		c.AbortWithStatus(http.StatusNotFound)
+	})
+
 	return engine, nil
 }