The Venona cables are published ont he internet. I even provided the link to them for you.
Whether anyone mentioned in the cables was actually involved in Soviet espionage remains a subject of dispute. The mere fact that someone's name came up in them proves nothing. Again, you have completely failed to demonstrate that anyone accused by McCarthy was a Soviet agent. What you would need is not a nebulous mention in cables of uncertain intent, but actual documentation of espionage activity.
That someone's name is mentioned in the Venona cables does not prove he or she was a Communist, either -- not that there would be anything wrong with that.