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 usernames, names, countries and data relating to users' Chess.com accounts. Analysis of the data suggested it had been obtained by scraping.
Chess.com (2026) - 4,653,212 breached accounts
About this summary. This is a short, independently written summary of an article first published by Have I Been Pwned. Cyber Security News did not report or verify the underlying story. Read the original: https://haveibeenpwned.com/Breach/Chess2026
Source attribution: headline and facts are from Have I Been Pwned (haveibeenpwned.com). Summary method: excerpt of the source description. See our source attribution policy.
Related coverage
Cloudflare fixes Containers cross-tenant flaw exposing customer data
Cloudflare has fixed a vulnerability in Containers and Sandboxes that allowed customers with a Workers Paid account to recover residual data from other customers'…
OpenAI’s Systems Meddled With U.S. Government Sites
Kate Conger, Ana Swanson, and Cecilia Kang report that OpenAI was behaving somewhat badly again- unless you just view it as a curious child exploring without evil…
UK: Ten NHS staff removed over Noah Woods data breach
Tom McArthur and Louise Parry report: Ten NHS staff have been removed from duty or suspended after a data breach involving the digital medical records of three-year-old…
Personal information of over 23,500 Simba customers leaked in data breach
Rhea Yasmine reports: Personal information of more than 23,500 Simba customers has been compromised in a data breach, the telco said in a statement on Sept 25. The data…
Rydox Admin Faces 20 Years After Selling Stolen Data and Fraud Tools
Kosovo national Ardit Kutleshi pleaded guilty to running Rydox, a cybercrime marketplace that sold stolen identities and credentials for years. Ardit Kutleshi, 28 years…
Week in review: Gyazo breach exposes 23.6M user data, TASK#STOMP steals documents
Here’s an overview of some of last week’s most interesting news, articles, interviews and videos: Know what was tested before your SAP ECC migration goes live In this…