hphp_libxml_input_buffer(const char *URI, xmlCharEncoding enc) {
  if (s_libxml_errors->m_entity_loader_disabled) {
    return nullptr;
  }
  return __xmlParserInputBufferCreateFilename(URI, enc);
}
NVD is only using a subset of CWE for mapping instead of the entire CWE, and the weakness type is not covered by that subset.