Dutch forward Van der Vaart and Welsh winger Bale both took part in Tuesday morning's training session ahead of the second leg of Tottenham's last-16 tie with AC Milan. Peter Crouch's late winner at a volatile San Siro gives Spurs a 1-0 advantage from the first leg.
Bale, who missed out on the trip to Italy due to a back injury, made his first appearance in six weeks when he came off the bench against Premier League rivals Wolves on Sunday.
Van der Vaart missed the 3-3 draw at Molineux and has not played for three weeks, but looked sprightly during an open session at the club's training ground in Chigwell, Essex.
Younes Kaboul, who has been out since December with a knee injury, also trained and could be fit for a shock return against the Rossoneri.