---
title: "Data breach at Chess.com (2026)"
description: "In August 2026, Chess.com (2026) suffered a data breach. 4.7 million accounts were affected. The exposed data includes email addresses, postal addresses, names and account identifiers."
canonical: https://inyourgeek.com/en/fuites-de-donnees/2026-08-03-chess-com-2026
type: fuite-de-donnees
author: "Sébastien Soulier"
publisher: "InYourGeek"
language: en
datePublished: 2026-09-13
dateModified: 2026-09-13
---
# Chess.com (2026)

Data breach — High

In August 2026, Chess.com (2026) suffered a data breach. 4.7 million accounts were affected. The exposed data includes email addresses, postal addresses, names and account identifiers.

| Fact | Value |
| --- | --- |
| Disclosed on | September 13, 2026 |
| Incident dated | August 3, 2026 |
| Accounts affected | 4.7M |
| Sector | Digital services |
| Country | International or undetermined |
| Cause | Undisclosed |
| Severity | High |
| Status | Confirmed |

## Exposed data

- Email address
- Postal address
- Full name
- Customer ID

## What you can do

- Expect phishing attempts quoting your name and this company. A message that knows your details is not legitimate for that reason.
- You can ask the organisation exactly what was exposed about you (right of access), and complain to the DPA if no answer comes within a month.

## Sources

- [Have I Been Pwned — Chess.com (2026)](https://haveibeenpwned.com/Breach/Chess2026) — Have I Been Pwned (CC BY 4.0)

_Entry built from Have I Been Pwned’s structured data, with no model rewriting._

---

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