Turns out it seems to be quite simple, but I am not sure if this is the correct way to do it, as it seems pretty hacky to me:
$controllers = App::objects('controller');
foreach($controllers as $controller) {
App::import('Controller', str_replace('Controller', '', $controller));
$properties = get_class_vars($controller);
if(isset($properties['components']) && (isset($properties['components']['MyPlugin.MyComponent']) || in_array('MyPlugin.MyComponent', $properties['components']))) {
$this->editable[] = str_replace('Controller', '', $controller);
}
}
Any better solution out there?