Link 1 contains nothing but a mention of Merck application from 1964. There is nothing there about whether or not it is used in vaccines today. That is OLD.
Link 2 is about a study dated 1975. That is OLD. It tests whether the adjuvant is effective.
Link 3 is a discussion by people guessing.
Link 4 more guessing.
Link 5 same as link 2.
Link 6 same as link 1. Nothing but old info about its actual usage in vaccines.
Link 7 not worth examining since it is a well known hoax site.
Nothing listed shows anywhere that peanut oil is used in vaccines today. In fact, is there anything there that shows peanut oil is used in vaccines at all? There is evidence that the peanut oil was considered as an adjuvant and that it appeared to be effective. But was it distributed? Certainly not listed in today's vaccines.