If you've stayed at a Marriott in the last few years, your credit card might've been hacked.

Marriott said that hackers gained access to the Starwood reservation system in 2014 and recently discovered the hack. Marriott has confirmed that they don't know if the hackers where able to access credit card numbers.

The hack could involve 374 million customers over the last few years and everything from names, e-mail, passports and arrival/departure was at risk.

Marriott has responded by reporting the hack to police and has started the process of emailing customers who might've been affected by the hack.

The data breach is one of the largest in recent history. You can check out more details and how you can check if you've been affected here