Neal Eardley's late equaliser snatched a point for 10-man Oldham.
Daniel Jones was red-carded after fouling Cleveland Taylor, with Michael Bridges firing the resulting penalty past keeper Shane Supple.
Danny Whitaker wasted a great chance to level for Oldham when he headed Eardley's 75th-minute cross wide of the target from close range.
But the Latics never gave up and were rewarded when Eardley smashed a 35-yard free-kick into the net.
Carlisle: Williams, Raven, Keogh, Murphy, Horwood, Cleveland Taylor, Kavanagh (Howarth 78), Morris, Anyinsah (Jeff Smith 42), Graham (Dobie 71), Bridges. Subs Not Used: Rothery, Kane.
Booked: Keogh, Kavanagh.
Goals: Bridges 44 pen.
Oldham: Supple, Eardley, Hazell, Gregan, Black (Lee 77), Whitaker, Maher (Stam 53), Allott, Jones, Taylor, Kabba (Alessandra 69). Subs Not Used: Fleming, Brooke.
Sent Off: Jones (43).
Booked: Hazell.
Goals: Eardley 89.
Att: 6,635
Ref: Kevin Wright (Cambridgeshire).
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