US EditionCheck Your iPhone Settings Now: Apple Releases First-Ever ‘Background’ Security Patch
The update fixes a WebKit bug that could let malicious sites access data across tabs, delivered as lightweight patches for iPhone, iPad, and Mac users, Apple said.
- On March 17, 2026, Apple released its first public Background Security Improvement for iPhone, iPad, and Mac, patching a Safari WebKit bug that risked cross-site data access.
- A security researcher reported the bug, according to the advisory posted Tuesday, and Apple had tested Background Security Improvement updates before the public release.
- Four platform versions were issued: iOS 26.3.1 , iPadOS 26.3.1 , macOS 26.3.1 and macOS 26.3.2 ; the lightweight update installs with a quick restart and can be checked in Settings > Privacy & Security or System Settings > Privacy & Security .
- Apple posted a security advisory about the issue on Tuesday but did not give a reason and did not immediately comment when contacted by TechCrunch.
- Background Security Improvements let Apple push lightweight fixes for system components and libraries, with devices on iOS 26.1 and higher eligible to receive these updates.
25 Articles
25 Articles
Apple has released a so-called "background security improvement" for its devices for the first time. The emergency update is not easy to find.
Apple Releases Background Security Improvement Update for macOS Tahoe 26.3.1, iOS 26.3.1, and iPadOS 26.3.1
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 26.3.1, iOS 26.3.1, and iPadOS 26.3.1 BSI update, as well as a macOS Tahoe 26.3.2 BSI update exclusive to the MacBook Neo.
Apple releases its first Background Security Improvement for macOS, iOS and iPadOS
Apple has started providing small security updates to iOS, iPadOS and macOS devices. These are dubbed Background Security Improvements that will offer minor system updates between the larger software updates. According to the company, these are meant to "deliver lightweight security releases for components such as the Safari browser, WebKit framework stack, and other system libraries that benefit from smaller, ongoing security patches between so…
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