The Vikings agreed to terms with Mundt on Friday, Tom Pelissero of NFL Network reports.
Mundt played five of the Vikings' 72 snaps on offense in Sunday's 3-0 win over the Raiders, finishing with one catch for four yards.
Mundt went without a target across seven snaps on offense Sunday in the Vikings' 19-13 win over the Bears.
Mundt played on five of the offense's 64 snaps in Sunday's loss to Tampa Bay and was not targeted in the passing game.
Mundt caught his only target for a 12-yard gain in Sunday's 27-22 win over the Jets.
Mundt had one reception for one yard in Sunday's win at Washington.
Mundt had a one-yard touchdown reception on his only target in Sunday's win over Arizona.
Mundt had a drop on his only target in Sunday's win over New Orleans in London.
Mundt had two receptions for 23 yards on two targets in Sunday's win over Detroit.
Mundt had two receptions for 28 yards on three targets in Monday's loss at Philadelphia.