  static scoped_refptr<WorkerData> WaitForFirstSharedWorker() {
    scoped_refptr<WorkerData> worker_data(new WorkerData());
    BrowserThread::PostTask(
        BrowserThread::IO, FROM_HERE,
        base::Bind(&WaitForFirstSharedWorkerOnIOThread, worker_data));
    content::RunMessageLoop();
    return worker_data;
  }

This category addresses vulnerabilities caused by flawed access control mechanisms, where incorrect permission settings allow unauthorized users to access restricted resources.