"At the moment there's all sorts of rumors going around," the Australian is quoted by Austria's Salzburger Nachrichten newspaper.
Indeed, in the wake of the 'Multi-21' affair and his nightmare Chinese grand prix a week ago, some conspiracy theorists were suggesting Red Bull was deliberately sabotaging Webber's car.
"There's also a lot of nonsense being peddled," Webber said.
The 36-year-old did not specifically address the Porsche rumors, except to say "I still have a lot to offer".
Salzburger Nachrichten reports that Webber is scheduled to have a "private conversation" with Red Bull magnate Dietrich Mateschitz on Monday.