void PDFiumEngine::LoadForm() {
  if (form_)
    return;
  DCHECK(doc_);
  form_status_ = FPDFAvail_IsFormAvail(fpdf_availability_, &download_hints_);
  if (form_status_ != PDF_FORM_NOTAVAIL || doc_loader_->IsDocumentComplete()) {
    form_ = FPDFDOC_InitFormFillEnvironment(
        doc_, static_cast<FPDF_FORMFILLINFO*>(this));
#if defined(PDF_ENABLE_XFA)
    FPDF_LoadXFA(doc_);
#endif

    FPDF_SetFormFieldHighlightColor(form_, FPDF_FORMFIELD_UNKNOWN,
                                    kFormHighlightColor);
    FPDF_SetFormFieldHighlightAlpha(form_, kFormHighlightAlpha);
  }
}  // namespace chrome_pdf

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.