Facebook's Cambridge Analytica breach affected 87 million users

A phone.
(Image credit: Kirill Kudryavtsev/AFP/Getty Images)

Personal information from up to 87 million Facebook users was improperly shared with data firm Cambridge Analytica, Facebook revealed Wednesday — significantly more than the company's previous estimate of 50 million.

Most of the 87 million users were Americans, the social media company explained in a blog post. Facebook will start notifying users next week if their information was improperly obtained. The post also outlined a number of measures intended to restrict data access for third-party apps, such as disabling a feature that allows users to search for friends using phone numbers, which put "most people on Facebook" at risk of data-scraping.

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Summer Meza, The Week US

Summer Meza has worked at The Week since 2018, serving as a staff writer, a news writer and currently the deputy editor. As a proud news generalist, she edits everything from political punditry and science news to personal finance advice and film reviews. Summer has previously written for Newsweek and the Seattle Post-Intelligencer, covering national politics, transportation and the cannabis industry.