void ExtensionService::UnregisterNaClModule(const GURL& url) {
  NaClModuleInfoList::iterator iter = FindNaClModule(url);
  DCHECK(iter != nacl_module_list_.end());
  nacl_module_list_.erase(iter);
}

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