I personally feel the risk of overflights is low. However, all flights in Afganistan are operated at 'own risk', so if you as captain are not willing to accept these risks, then don't do it.
Afghanistan Ministry of Transport and Civil Aviation
All operators are advised that non-military operations could be at significant risk because of ongoing military operations in Afghanistan. There are continuing reports of indiscriminate small arms and missile attacks on aircraft operating in Afghanistan, primarily at low altitudes. Therefore, operators that undertake flights within the Kabul FIR shall do so at their own risk.