Nightly

dist/preview release/babylon.max.js

@@ -23779,6 +23779,10 @@ var BABYLON;
                 BABYLON.Tools.Error("Wrong sceneFilename parameter");
                 return;
             }
+            if (sceneFilename.substr && sceneFilename.substr(0, 1) === "/") {
+                BABYLON.Tools.Error("Wrong sceneFilename parameter");
+                return;
+            }
             var loadingToken = {};
             scene._addPendingData(loadingToken);
             var manifestChecked = function (success) {

src/Loading/babylon.sceneLoader.js

@@ -95,6 +95,10 @@ var BABYLON;
                 BABYLON.Tools.Error("Wrong sceneFilename parameter");
                 return;
             }
+            if (sceneFilename.substr && sceneFilename.substr(0, 1) === "/") {
+                BABYLON.Tools.Error("Wrong sceneFilename parameter");
+                return;
+            }
             var loadingToken = {};
             scene._addPendingData(loadingToken);
             var manifestChecked = function (success) {

src/Loading/babylon.sceneLoader.ts

@@ -107,6 +107,11 @@
                 return;
             }
 
+            if (sceneFilename.substr && sceneFilename.substr(0, 1) === "/") {
+                Tools.Error("Wrong sceneFilename parameter");
+                return;
+            }
+
             var loadingToken = {};
             scene._addPendingData(loadingToken);