Apple has an update for iOS 26.4 that simply fixes some unspecified bugs and improves security. Earlier this month, Apple released iOS 26.4.1 to specifically address an iCloud syncing bug, but it’s unclear exactly what this new update fixes. Of note, it’s the first iOS 26 update that has received a second mid-release update.

The release notes for iOS 26.4.2 read simply:

This update provides bug fixes and security updates for your iPhone.

Apple’s security updates page lists a single security patch (CVE-2026-28950) for the update, targeted at Notification Services, though it doesn’t appear to be particularly critical. According to the notes, “Notifications marked for deletion could be unexpectedly retained on the device,” and Apple fixed the issue by addressing a logging issue with improved data redaction.

To update your iPhone or iPad:

• Open Settings
• Select General
• Select Software Update
• Follow the on-screen instructions

Apple is currently testing iOS 26.5, which is due to arrive sometime in May.