A high-quality unauthorised copy of Spider-Man: Brand New Day was reportedly posted on X shortly after the film entered cinemas, allowing users to watch it and share major plot revelations before Sony had it removed. The incident matters because it potentially undermines the film’s opening-weekend cinema performance and highlights the difficulty studios face in controlling piracy on social media.

Variety reported that the original post reached 5.9 million X accounts, received more than 143,000 likes and was reshared over 10,000 times. Clips containing key reveals also circulated, although some were replaced with copyright-removal notices; Sony declined to comment on the leak or any further action. The film opened on 31 July 2026 and had earned $72 million in preview box office takings, while IGN awarded it 7/10.