Cantwell’s effort restored Norwich’s lead in first-half stoppage time after Arsenal’s defence backed off.
Aubameyang fired in from close range to level again in the 57th minute but it was Norwich who looked the more likely winners with Leno making several good saves.
Doherty scores equaliser for Wolves
A superb second-half header by Matt Doherty cancelled out an early goal by Lys Mousset as Wolverhampton Wanderers extended their unbeaten Premier League run to nine games.
The crowd at Molineux had barely taken their seats when Mousset struck after 62 seconds for Sheffield United, taking a touch to control the ball in the box before slamming it home to put the visitors ahead.
Despite creating a number of decent chances, the home team looked all at sea for much of the first hour until Doherty met a Raul Jimenez cross with a powerful header to put them level in the 64th minute.
Doherty celebrated the goal with an emotional tribute to the two-year-old daughter of former Wolves striker Benik Afobe who passed away on Friday, removing the black arm-band being worn in her honour and kissing it before holding it up to the sky.
The goal prompted a sustained period of pressure from Wolves, but Sheffield United showed why they are unbeaten away from home this season with a tenacious defensive display as they hung on for the draw.