Sram HRD brakes – fluid leak in shifter/ brake

Just cleaned my bike after the Whitby Dirt Dash and found that my front brake lever is pulling to the bars and there appears to be fluid coming out of the port in the bar shifter/ lever when I pull back the rubber cover. Are these repairable or an I going to need to replace the  unit?

Pretty sure that is something I had on Sram (it was a couple of bikes ago!)

I had to replace the bladder in the hood

You have checked the bleed port is tight? Can’t remember but does it have an o-ring that might have failed. SRAM rebuild parts are available at a price but you’ll need to identify the leaky part first.