Apple Releases Background Security Improvement Update for macOS Tahoe 26.3.1, iOS 26.3.1, and iPadOS 26.3.1

MacRumors
By Juli CloverMar 17, 2026, 2:52 pm126 ptsTrending
Apple today released the first Background Security Improvement (BSI) update, replacing the rapid security updates that it used to seed out a few years ago. The first BSI updates address a WebKit vulnerability that could allow maliciously crafted web content to bypass Same Origin Policy. There's a macOS Tahoe…

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