diff --git a/aas-web-ui/src/components/AppNavigation/AppNavigation.vue b/aas-web-ui/src/components/AppNavigation/AppNavigation.vue
index 9adc88ae..7e7d1edf 100644
--- a/aas-web-ui/src/components/AppNavigation/AppNavigation.vue
+++ b/aas-web-ui/src/components/AppNavigation/AppNavigation.vue
@@ -422,15 +422,12 @@
     }
 
     function validURL(str: string) {
-        var pattern = new RegExp(
-            '^(https?:\\/\\/)?' + // protocol
-                '((([a-z\\d]([a-z\\d-]*[a-z\\d])*)\\.)+[a-z]{2,}|' + // domain name
-                '((\\d{1,3}\\.){3}\\d{1,3}))' + // OR ip (v4) address
-                '(\\:\\d+)?(\\/[-a-z\\d%_.~+]*)*' + // port and path
-                '(\\?[;&a-z\\d%_.~+=-]*)?' + // query string
-                '(\\#[-a-z\\d_]*)?$',
-            'i'
-        ); // fragment locator
-        return !!pattern.test(str);
+        try {
+            const url = new URL(str);
+            // Ensure we only accept web protocols (http/https)
+            return url.protocol === 'http:' || url.protocol === 'https:';
+        } catch {
+            return false;
+        }
     }
 </script>