Nearly five million people who use DoorDash are at risk after a data breach. 

According to the food delivery company, anyone who joined before April 5, 2018, could be affected -- approximately 4.9 million users. Users who joined after the date are not affected.

The company says it discovered unauthorized access from a third party back on May 4.

The breach may have exposed information such as names, email addresses and delivery addresses.

The company is notifying customers whose information was compromised.