Can you die from vesicovaginal fistula?

Unlikely: Untreated bladder infections could cause the infection to travel into your blood and cause sepsis. This is not very common in healthy people. A vesicovaginal fistula can make you more susceptible to a bladder infection.

No reason: Vesicovaginal fistula wordwide is common, usually as result of birthtrauma, but cause in most developed countries is complication of gyn surgery. It won't kill you but symptoms of continually leaking urine and recurrent utis are very unpleasant thus surgical repair is advisable. Some can die in Africa from massive sepsis. Surgery can be quite complex so best to find an experienced pelvic surgeon.