Red Bull's double world champion Vettel is probably Maranello bound for the season after.
Red Bull's Dr Helmut Marko told Bild: "That's false. That report is wrong, plain and simple."
The German newspaper said Vettel, 25, has a contract with Red Bull that includes 2014, but the deal includes 'get-out clauses'.
But Ferrari spokesman Luca Colajanni rubbished the Vettel link.
"It's not the first time this year we've heard it, and it will not be the last."
That's not exactly a denial, but Ferrari president Luca di Montezemolo - speaking on Italian radio Rai - was much clearer.
"I've always said that I don't want two roosters in the hen-house," he said.
"I don't like that and it creates instability in the team."