void NavigatorImpl::CancelNavigation(FrameTreeNode* frame_tree_node) {
  CHECK(IsBrowserSideNavigationEnabled());
  frame_tree_node->ResetNavigationRequest(false);
  if (frame_tree_node->IsMainFrame())
    navigation_data_.reset();
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.