No. The Church, in her wisdom and mercy, foresees this possible situation. Because a priest, like anyone else, could fall into serious sin and for any number of reasons may be prevented from bringing that to confession immediately. Where the priest differs from a regular lay person, however, is the requirement that he must receive the Eucharist at any Mass he celebrates/concelebrates. Now, if a priest does not need to celebrate Mass immediately (i.e. it’s his day off and he has the ability to visit a brother priest and celebrate the sacrament) he should refrain from celebrating Mass until he has been absolved.
But, the problem is when the priest has a scheduled Mass and can’t get to confession beforehand. The Church does not impose on him a burden she imposed on no one else, namely public confession. In other words, Fr. John Doe doesn’t need to stand up on Sunday morning and say, “Sorry folks. I partied a bit too hard last night, had too much to drink, and couldn’t get to confession. So, no Mass this morning.” In such a case, the Church says he should make a good act of contrition and have the intention of getting to confession as soon as possible. Then, he should celebrate Mass (and obviously receive communion) without burden.
For the lay man or woman who chooses not to receive, it be for any number of reasons (already received twice, not in a state of grace, not kept the fast).
Hope that helps…