0137 GMT October 16, 2019
Fellow PSG striker Zlatan Ibrahimovic grabbed a double, including a last-gasp penalty, and set up two others as PSG steamrollered past Guingamp, Reuters reported.
With two games left, PSG has 77 points and lead second-placed Olympique Lyonnais, which has a game in hand, by six points with a better goal difference (+45 to +41).
Uruguay striker Cavani put the host ahead after three minutes when he latched on to Serge Aurier's cross from the right after the full back was played in by Argentine playmaker Javier Pastore.
Sweden forward Ibrahimovic made it 2-0 in the 18th minute with a low shot after a fine one-two between Marco Verratti and Cavani had unsettled the Guingamp defense.
In the 27th minute, Pastore unleashed a fierce shot that was deflected on to the post by keeper Jonas Loessl.
Cavani made it 3-0 seven minutes into the second half from close range after being set up by Ibrahimovic's deflection.
Ibrahimovic then set up Maxwell for the fourth with a cross for the Brazilian to score with a header in the 57th.
Cavani then scored his 16th league goal of the season, and his eighth in the last six games, when he volleyed home from Verratti's free kick 20 minutes from time.
Ibrahimovic wrapped up the victory with a penalty in the 90th after being fouled by Jeremy Sorbon for his 19th league goal this term.
Sunday could prove decisive in the race for third place when Olympique de Marseille, in fourth spot, will host Monaco which is three points ahead of its opponents in third.
Fifth-placed St Etienne, which is level on points with Marseille, is also in the mix for the last Champions League spot. They will host Nice today Sunday.