A knife in a dream can point to a threat you sense but haven't named, or to a truth that feels sharp enough to cut through pretense. Holding the knife yourself often reflects a decision to cut ties with something, while facing one aimed at you may point to feeling exposed or attacked.
News or rumours related or reported, the Moon being in the first face of Scorpio, are lies, and purposely framed. (Hermes Aph 11)