Basic-Fit disclosed a data breach impacting approximately 1 million members across several European countries, resulting from unauthorized system access where attackers exfiltrated member data. The compromised information includes names, email and physical addresses, phone numbers, dates of birth, and bank account details, though no passwords or identification documents were accessed. The company has not attributed the attack to a known threat actor and is not aware of the stolen data being misused or leaked publicly.
Data Breaches Europe’s Largest Gym Chain Says Data Breach Impacts 1 Million Members Basic-Fit has reported that hackers have stolen names, dates of birth, and even bank account details. By Eduard Kovacs | April 14, 2026 (8:43 AM ET) Flipboard Reddit Whatsapp Whatsapp Email Basic-Fit, Europe’s largest gym and fitness chain, has disclosed a data breach affecting the personal information of roughly 1 million members. In a press release published on Monday, the Netherlands-based company said it recently detected unauthorized access to systems. While the intrusion was blocked within minutes, an investigation revealed that data belonging to active members in several countries had been downloaded by the hacker. Compromised information includes names, email addresses, physical addresses, phone numbers, dates of birth, and bank account details. “Basic-Fit does not hold identification documents of members and no passwords were accessed,” the gym chain said in a statement . Basic-Fit, which has over 5 million members and 1,500 clubs across Europe, said in its press release that roughly 200,000 members from the Netherlands are affected. Advertisement. Scroll to continue reading. However, it has separately told the media that a total of approximately 1 million members are affected, including in Spain, Germany, France, Belgium, and Luxembourg. It’s unclear who is behind the attack. No known ransomware group has taken credit for the hack and the company said it’s not aware of the data being leaked or misused. Related : Nightclub Giant RCI Hospitality Reports Data Breach Related : Booking.com Says Hackers Accessed User Information Related : 300,000 People Impacted by Eurail Data Breach Written By Eduard Kovacs Eduard Kovacs (@EduardKovacs) is senior managing editor at SecurityWeek. He worked as a high school IT teacher before starting a career in journalism in 2011. Eduard holds a bachelor’s degree in industrial informatics and a master’s degree in computer techniques applied in electrical engineering. 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