A significant data breach at Eurail, a European travel company, has compromised the personal data of approximately 300,000 individuals. The breach, which occurred in December 2025, involved the theft of names and passport numbers from the company's network. This sensitive information can be used for identity theft and other malicious activities, posing a substantial risk to those affected. The breach is particularly concerning given the sensitive nature of passport numbers, which can be used to facilitate travel and other activities1. The fact that hackers were able to access and steal this data raises questions about the company's cybersecurity measures and its ability to protect sensitive customer information. This breach matters to practitioners and informed readers because it highlights the importance of robust data protection measures, especially for companies that handle sensitive customer information, and the need for prompt notification and response in the event of a breach.