Contradiction with John 18:3
This verse states Judas came with soldiers and officers from the chief priests and Pharisees, whereas Matthew 26:47 mentions a great multitude with swords and staves, omitting specifics on soldiers and officers.
John 18:3: Judas then, having received a band [of men] and officers from the chief priests and Pharisees, cometh thither with lanterns and torches and weapons.
Contradiction with Mark 14:43
This verse implies that those who came with Judas were from the chief priests, scribes, and elders, which is slightly different in composition compared to Matthew 26:47 that states just chief priests and elders.
Mark 14:43: And immediately, while he yet spake, cometh Judas, one of the twelve, and with him a great multitude with swords and staves, from the chief priests and the scribes and the elders.
Contradiction with Luke 22:47
This verse does not specify who accompanied Judas, only that he went before them, whereas Matthew 26:47 describes the multitude as being sent from the chief priests and elders.
Luke 22:47: And while he yet spake, behold a multitude, and he that was called Judas, one of the twelve, went before them, and drew near unto Jesus to kiss him.