watchOS 26.4 — APPLE-SA-126798

Summary

watchOS 26.4 Apple Watch Series 6 and later 24 Mar 2026 visionOS 26.4 Apple Vision Pro (all models) 24 Mar 2026 Safari 26.4 macOS Sonoma and macOS Sequoia 24 Mar 2026 Xcode 26.4 macOS Tahoe 26.2 and later 24 Mar 2026 <td class="gb-

Product

watchOS 26.4

What to do

General, cautious steps (verify details in the official source):

• Review exposure and plan remediation based on risk and environment.
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source

Related advisories