Do you think that this is an ex cathedra statement:
Wherefore, in order that all doubt may be removed regarding a matter of great importance, a matter which pertains to the Church’s divine constitution itself, in virtue of my ministry of confirming the brethren (cf. Lk 22:32) I declare that the Church has no authority whatsoever to confer priestly ordination on women and that this judgment is to be definitively held by all the Church’s faithful. (John Paul II, Ordinatio Sacerdotalis)
It seems to have all the requisite components, speaking in his capacity as Pope, declaring something of faith and morals and intending to bind on the universal Church. So, what say you?