(NEWSER) – Attention, Target shoppers: That Black Friday bargain you scored might have some serious strings attached. Target today confirmed that some 40 million credit and debit card accounts may have been affected by a data breach, after Krebs on Security and the Wall Street Journal yesterday reported the chain was investigating a major such breach at its physical stores; online shoppers appear to be safe. Target says those who made purchases at its US stores with their cards between Nov. 27 and Dec. 15 may have been hit, reports the AP.

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