diff --git a/modules/json_form_widget/src/WidgetRouter.php b/modules/json_form_widget/src/WidgetRouter.php
index 7ad9c15392..79047a42d1 100644
--- a/modules/json_form_widget/src/WidgetRouter.php
+++ b/modules/json_form_widget/src/WidgetRouter.php
@@ -303,6 +303,8 @@ public function handleUploadOrLinkElement(mixed $spec, array $element) {
     if (isset($spec->extensions)) {
       $element['#upload_validators']['file_validate_extensions'][] = $spec->extensions;
     }
+    // If a maxlength was set earlier, remove it as it is not allowed here.
+    unset($element['#maxlength']);
     return $element;
   }