Facebook Inc. FB, +0.59% said late Wednesday that about 4 million users may have had their personal data misused by a third-party app. In a blog post, Facebook said it has banned myPersonality, an app that was mostly active prior to 2012, for failing to agree to an audit and for sharing data with researchers and other companies. Facebook said it would notify those accounts that were affected, and that there was no evidence that friends of those users had also been affected. The company cracked down on third-party apps that share user data earlier this year following the Cambridge Analytica scandal, which affected about 87 million users. Facebook said Wednesday it has since suspended more than 400 apps.
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