Apple has released its first Background Security Improvements update to address a WebKit vulnerability tracked as CVE-2026-20643 affecting iPhones, iPads, and Macs. This marks Apple's debut of a new update mechanism designed to deliver security fixes without requiring users to install complete operating system upgrades.
The WebKit flaw impacts Apple's browser engine used across Safari and other applications on iOS, iPadOS, and macOS devices. The company has not disclosed the severity score or technical details of the vulnerability, though the rapid deployment suggests it poses a significant security risk to users.