Apple has released its first “background security improvement” update to address a security vulnerability in its Safari web browser across iPhones, iPads, and Macs.
According to a new security advisory posted on Tuesday, Apple reported that a security researcher found a flaw in WebKit, the browser engine for Safari and other apps. If exploited, this flaw could potentially enable a malicious website to access data from another website in the same browser session.
Apple defines background security improvements as “lightweight” software updates containing crucial fixes for security vulnerabilities, which are distributed to users’ devices between major software updates.
These updates, available for iPhones, iPads, and Macs running the latest versions of iOS, iPadOS, and macOS (version 26.1 and higher), may address issues in components like Safari, its WebKit engine, and other system libraries that benefit from ongoing security updates.
Apple did not provide a reason for addressing this specific bug, and a company spokesperson did not immediately respond when contacted by TechCrunch.
Downloading the new background security update only required a quick device restart, not the longer reboot typically needed for major software updates.
Before Tuesday’s initial background security improvement, Apple issued several security fixes to software testers to trial the new update feature before its release.
