Apple releases background security improvements update to fix WebKit flaw

Apple has issued its first Background Security Improvements update addressing a WebKit vulnerability (CVE-2026-20643) affecting iOS, iPadOS, and macOS. The update, delivered as iOS 26.3.1, iPadOS 26.3.1, macOS 26.3.1, and macOS 26.3.2, fixes the flaw without requiring a full OS upgrade.