Fast-food chain Chick-fil-A is warning customers after attackers hijacked loyalty accounts using stolen passwords in a credential stuffing attack.
Chick-fil-A says it detected suspicious login activity against some Chick-fil-A One accounts in June and launched an investigation. The company later concluded that unauthorized parties ran an automated credential stuffing attack against its website and mobile app between June 17 and June 19, 2026, using usernames and passwords obtained from previous data breaches or other third‑party sources. Chick-fil-A says it reset passwords and ended active sessions for affected accounts while investigating the incident.
Credential stuffing is an attack where criminals take username–password pairs stolen from one service and automatically try them on many other websites and apps to see where they still work. Because many people reuse passwords, attackers often gain access to accounts without ever breaking into the company’s systems in the traditional sense.
So, some may conclude that there are two sides to this. On the one hand, customers who reuse passwords across multiple sites make credential stuffing attacks much more likely to succeed. On the other, companies also have a responsibility to put protections in place to detect and block automated credential stuffing attacks before accounts are compromised.
