ORCA
That's not to say a fleet is impervious, just that to really get in and do damage you probably want to co-ordinate a mass missile (let's say twenty plus weapons) arrival with sub-surface attack and leave aeroplanes out of it, nowadays.
So the threat to CVF would be anyone who could do that at the planned stand off range. Still doesn't quite fit into my idea of easy.
So the Brahmos missile 290km range/Mach 3 that can be launched from Su-30,Submarine,Surface,land would likely do it then?
Then you have Brahmos II coming ?