Precisely. I always strongly disliked cases where REST methods are exposed under non service catalog provided base. This is an ugly grave full of corpses.
Idea with regex sounds like a least bad for me. Eventually finding /v1 and getting one level above.

You mean using the path up until "v1" or "v[1-9]+"?
But is v1 (or any version) always part of the endpoint url so it's possible to use this as a definitive delimiter?

In any case, could you then craft a patch for this one?
Regards and thanks again,

Christian