i would suggest re-skeining and washing the malabrigo.
the two items i've made with malabrigo bled badly when washed. the FO turned the water the same color as yarn! it would take 2 or 3 soaks in soapy water to get all the loose dye out. but, that said, the yarn never lost it's vibrancy. oh and those Shout Color Cather sheets
really help too. (i've had a pair of red socks accidentally get into a white load, i threw one in out of habit, and it saved my whites from turning pink)
if you're going to knit with a cream yarn and don't want a tie dye effect, definitely wash the malabrigo before using it.