Michel Macedo appeared to secure an unexpected victory for Corinthians at the Pacaembu when he fired an unstoppable shot past goalkeeper Weverton in second-half stoppage time late on Saturday, reports Efe news.
But Bruno Henrique salvaged a point for the hosts with a 94th-minute strike after the Corinthians defence failed to deal with a Dudu corner.
Earlier, Corinthians goalkeeper Walter kept out a Gustavo Scarpa penalty attempt following Manoel's handball in the area.
Palmeiras remained second in the 20-team standings on Saturday night, seven points behind leaders Flamengo, who had a game in hand. Corinthians were sixth, 25 points off the pace with six rounds remaining after this weekend.
In Saturday's only other fixture, Venezuelan playmaker Yeferson Soteldo netted a brace as third-placed Santos won 3-0 at Goias.