At the time we had 24 members and I sent a recruit invite to a player as did someone else in the squad. It was pure luck that both players accepted the invites at the same time. That allowed them both to join and now we have 26 members.
Due to how this glitch was achieved, it would be possible to have as many players in a squad as players in the game, assuming they all click accept at the exact same time.
Not a major glitch or game breaking really but thought it was worth posting here so that the staff know about it.