void ChromeDownloadManagerDelegate::NotifyExtensions(
    DownloadItem* download,
    const base::FilePath& virtual_path,
    const NotifyExtensionsCallback& callback) {
  DCHECK_CURRENTLY_ON(BrowserThread::UI);
  DCHECK(!download->IsTransient());

#if BUILDFLAG(ENABLE_EXTENSIONS)
  extensions::ExtensionDownloadsEventRouter* router =
      DownloadCoreServiceFactory::GetForBrowserContext(profile_)
          ->GetExtensionEventRouter();
  if (router) {
    base::Closure original_path_callback =
        base::Bind(callback, base::FilePath(),
                   DownloadPathReservationTracker::UNIQUIFY);
    router->OnDeterminingFilename(download, virtual_path.BaseName(),
                                  original_path_callback,
                                  callback);
    return;
  }
#endif
  callback.Run(base::FilePath(), DownloadPathReservationTracker::UNIQUIFY);
}

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.