std::string TabNodeIdToClientTag(const std::string& session_tag,
                                 int tab_node_id) {
  CHECK_GT(tab_node_id, TabNodePool::kInvalidTabNodeID);
  return base::StringPrintf("%s %d", session_tag.c_str(), tab_node_id);
}

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.