Amazon.com customers' names and email addresses were "inadvertently disclosed" on its website, just days before the Black Friday shopping frenzy.
In a statement on Wednesday, Amazon said, "We have fixed the issue and informed customers who may have been impacted."
The e-commerce giant did not say how many people were affected or how their info may have been viewable.
Amazon customers in the US and Europe who had received the notifications via email on Wednesday about the breach posted about the notices on social media. News of Amazon's data breach was first reported by BetaNews.
According to Amazon, neither its website nor its back-end systems were compromised by the glitch.
News that makes sense
Your trusted source for staying up-to-date with the world around you. Get free daily news updates and analysis, straight to your inbox.
In its notifications to customers, the company said that they did not need to change their passwords.
