Chick-fil-A Discloses Data Breach from Credential Stuffing Attacks

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American fast food chain Chick-fil-A has confirmed a data exposure event affecting customer accounts following a series of credential stuffing attacks.

Breach Details

Chick-fil-A, which operates over 3,000 locations across multiple countries, disclosed the breach through notifications sent to impacted individuals and regulatory filings. The breach was identified through anomalous login activity on Chick-fil-A One accounts, with investigators determining that malicious actors executed an automated assault on the company’s website and mobile application between June 17 and June 19, 2026. Attackers utilized login credentials sourced from an external repository to exploit vulnerabilities in account authentication systems.

Attack Timeline

According to internal findings, the unauthorized access occurred as early as July 13, 2026, potentially exposing sensitive customer data.

Affected Data

Affected information includes names, physical addresses, membership identifiers, mobile payment details, QR codes, stored credit balances, and the last four digits of payment cards. Additional records such as birth dates, phone numbers, and addresses may have been accessed if stored within compromised accounts.

Response and Mitigation

Chick-fil-A initiated measures to secure affected accounts, including logging out users, removing stored payment information, and restoring account balances. The company also provided additional rewards to affected customers as a mitigation step. Users were advised to update passwords immediately to prevent further exploitation.

According to internal findings, the unauthorized access occurred as early as July 13, 2026, potentially exposing sensitive customer data.

A corporate representative did not comment on the scale of the breach when contacted by BleepingComputer.

Previous Incident

This incident follows a similar compromise in 2023, when threat actors accessed personal data and reward balances for over 71,000 customers through credential stuffing attacks between December 2022 and February 2023.

Credential Stuffing Overview

Credential stuffing attacks involve automated tools that test stolen username-password combinations across platforms, leveraging reused credentials to gain unauthorized access. This method allows threat actors to harvest personal and financial data, which can be monetized through resale or used for identity fraud.