Apple confirms hidden iOS 26 security update, and Google confirms silent iOS 18 spyware compromise. What you need to know and ...
OS 26.3.1(a) arrives as a background security update with a WebKit navigation API input-validation fix, with no new features expected.
Apple released iOS 26.3.1 (a) to fix a critical WebKit vulnerability (CVE-2026-20643). Learn how to enable Background Security Improvements.