No, there aren't. There are only reposts of the one WaPo story. And anything that isn't directly a repost, or a reporting of the WaPo story is rather bringing up issues with the WaPo story. Also, the head of the organization that oversees the USA's 17 spy branches has disowned the "CIA assessment" allegation, saying the CIA's information lacked any evidence directly-connecting Russia, and that "(It was) a thin reed upon which to base an analytical judgment."

There is literally no corroboration of the WaPo story, not even from the CIA. Rather, the head of USA spy organizations disowns the WaPo story. On the other side of things, there is extensive, and growing proof that the WaPo story was fictitious propaganda from the start. Even the WaPo article's own text contradicts the "CIA has concluded" claim, by making it clear that the suspicions are not shared by all at the CIA, are not directly-linking Russia and the DNC-leak, and ultimately do not amount to any conclusion.