If you shop at Delta, Sears, Best Buy, and/or Kmart [More Listed Below]; Your credit card may be compromised.

Delta Air Lines Inc. and Sears Holding Corp. announced on Wednesday they were affected by a cybersecurity breach at the software company they both use called 247.ai.

The software company informed the retailers on March 28 that a breach occurred from Sept. 26 to Oct. 12, 2017. It reportedly affected customer payment information.

Sears says that under 100,000 customers have been affected, and that the breach includes Kmart shoppers.

Delta has confirmed that no other information, such as the passport or other government ID info, was compromised. However, the investigation into the extent of the breach is ongoing.

“At this point, even though only a small subset of our customers would have been exposed, we cannot say definitively whether any of our customers’ information was actually accessed or subsequently compromised,”

—Delta said in a statement.

Sears is also continuing its investigation, and working to let affected customers know about the breach as it learns more.

“Our top priority at this point is to quickly identify the impacted customers, notify and assist them in every way possible,”

— Sears said in a statement.

Best Buy refused to give a statement or give numbers of possibly affected customers at this time.

(You don’t need to have used the online chat software to be affected — Delta believes that if you entered billing information into these companies’ desktop websites between Sept. 26 and Oct. 12, 2017, there’s a chance your information was compromised.)

(A January profile of [24]7.ai listed American Express, AT&T, Citi, eBay, Farmers Insurance and Hilton as clients of the chat company as well. American Express confirmed that it wasn’t affected by the breach.)

DeHashed will make an attempt to obtain the breached data and send an automated email to all those affected.