Hackers have broken into the credit and debit card payment networks at supermarket store chainsAlbertson's and SuperValu.
The massive hack impacts their umbrella of stores, as well, including Albertson's Acme, Jewel-Osco, Shaw's and Star Market supermarkets, as well as SuperValu's Cub Foods, Hornbacher's, Farm Fresh, Shop 'N Save and Shoppers Food & Pharmacy.
The grocery chains haven't yet said how many customers might be affected. SuperValu said it knows hackers broke into the computer network that processes card payments, but it's unsure whether they managed to take the data.
If they did, hackers made off with the typical information stored on a credit card's magnetic stripe: your name, card number, expiration date and the three-digit security code, said CNN Money.
SuperValu said the virtual break-in affected credit cards swiped at 228 stores between June 22 and July 17. Albertson's did not say how many of its 1,060 locations were affected by the hack. But it believes more than 700 were affected, said CNN Money.
That includes every Acme, Jewel-Osco, Shaw's and Star Market -- plus all Albertson's stores in Southern California, Idaho, Montana, North Dakota, Nevada, Oregon, Washington, Wyoming and Southern Utah.
SuperValu said the security hole has been plugged and customers can now safely use card swiping terminals at its stores.
Read more: www.cnnmoney.com