Reports emerged overnight claiming that a deal for the Spaniard to move to the Bluebirds will be finalised in the coming days.
However, Rosler has revealed that another club is also interested in signing the 29-year-old defender.
"There have been a couple of clubs who met the asking price and we gave Ivan permission to talk to them, that's all I can say," BBC Sport quotes Rosler as saying. "One is well documented. One is Cardiff."
Crystal Palace are also said to be keen on the player.