Facebook is alerting 6 million of its users that their e-mails or phone numbers were inadvertently shared with other members.
The social network said Friday that it has discovered and patched a bug in its "Download Your Information" tool that unintentionally exposed some members' contact details. The bug was reported earlier this month through the company's White Hat program
, which rewards security researchers for reporting vulnerabilities. The bug was fixed within 24 hours, a company spokesperson told CNET.
"It's ... something we're upset and embarrassed by," Facebook said in a note
published to its security blog. "We'll work doubly hard to make sure nothing like this happens again."
The glitch itself is a bit difficult to explain, but essentially if you chose to download a copy of your data, your Facebook archive may have included the phone number or e-mail address of a person who you are connected to but did not have those particular contact details for. The extra information was provided because of a hiccup during the friend recommendation process.
Facebook explained the situation security blog
with the following description: