[Breach] Chess.com (2026) — 4,653,212 accounts exposed

Breached service: Chess.com (2026) Domain: chess.com Accounts exposed: 4,653,212 Breach date: 2026-08-03 Added to HIBP: 2026-09-13T13:09:11Z Data classes leaked: Email addresses, Geographic locations, Names, Usernames Description: In August 2026, millions of records allegedly sourced from Chess.com were posted online. The data contained 7.3M rows with 4.6M unique email addresses, along with userna