Your iPhone and Mac might have updated overnight. Here’s why

Macworld

Apple has released an update to iOS 26.3.1, iPadOS 26.3.1, macOS 26.3.1, and macOS 26.3.2 (currently a MacBook Neo-only version). The update is part of Apple’s Background Security Improvements feature in its newest operating systems, which used to be called Rapid Security Responses. The update doesn’t appear in Software Update.

According to an Apple support document, the update contains a single fix for a WebKit vulnerability (WebKit is the engine used by Safari and other software with web access).