std::string RenderFrameDevToolsAgentHost::GetOpenerId() {
  if (!frame_tree_node_)
    return std::string();
  FrameTreeNode* opener = frame_tree_node_->original_opener();
  return opener ? opener->devtools_frame_token().ToString() : std::string();
}

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.