Cardiff rued Arter firing over after Petr Cech passed the ball straight to him in the eighth minute, with Mustafi allowed space to power in Granit Xhaka’s corner.
Etheridge was out quickly to prevent Nacho Monreal from doubling Arsenal’s lead and Lacazette sent a low shot skidding against the base of the post.
Camarasa was fortunate to see the ball fall his way, having failed to control Joe Bennett’s cross, but steered home unerringly.
A frequently scrappy encounter enjoyed a moment of stunning quality after the hour and all Arsenal’s star attackers were involved.
Lacazette flicked Ozil’s pass into Aubameyang’s path and the ex-Borussia Dortmund star curled a wonderful effort across Etheridge from 25 yards.
It was not enough to dissuade Cardiff, however, and Ward expertly guided Sean Morrison’s header back across goal in off the post with 20 minutes to play.
Bobby Reid lost his footing when an improbable Cardiff victory beckoned; Lacazette had no such troubles on the end of substitute Lucas Torreira’s 81st-minute pass.
A similar challenge awaits for Arsenal, who travel to Newcastle United after the international break. Cardiff will take their underdog show to Chelsea.
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