Cabaye could be sidelined for rest of year
"He will definitely have an operation, and we think it's going to be on Friday or Monday, I'm not sure," Pardew told a news conference. "That's a blow to us because he's a top player."
The 26-year-old missed Newcastle's Premier League defeat to Swansea last weekend.
Newcastle are due to host Maritimo in a Europa League Group D match on Thursday. The Premier League side top the group with eight points from four games.