Even though the subject of who's in Hell isn't a matter of faith and morals to be ruled on by the Church, nevertheless, what's said of Judas Iscariot in Scripture leaves little room for doubt.
On Tuesday of Holy Week each year in the Traditional Latin Mass, the betrayal of Jesus is read from Mark 14: 21. In this pericope, Our Lord relates, "The Son of man indeed goes, as it is written of him: but woe to that man by whom the Son of man shall be betrayed. It were better for him, if that man had not been born."
Because of the fall of Judas, St. Peter led the Apostles in picking his replacement, who would be St. Matthias. While conducting the election, St. Peter had some interesting things to say about Judas. In Acts 1:16–20, St. Peter declares:
Men, brethren, the scripture must needs be fulfilled, which the Holy Ghost spoke before by the mouth of David concerning Judas ... he indeed hath possessed a field of the reward of iniquity ... the same field was called ... the field of blood. For it is written in the book of Psalms: Let their habitation become desolate, and let there be none to dwell therein. And his bishopric let another take.
Saint Peter was referring to Psalm 108:6–8: "Set thou the sinner over him: and may the devil stand at his right hand. When he is judged, may he go out condemned; and may his prayer be turned to sin. May his days be few: and his bishopric let another take."
Watch the panel discuss the fall of Judas in The Download—Spy Wednesday.