CVE-2026-20643: Apple iPadOS

Medium severity, CVSS 5.4. EPSS: 0.4% chance of exploitation in the next 30 days.

A cross-origin issue in the Navigation API was addressed with improved input validation. This issue is fixed in Background Security Improvements for iOS, iPadOS, and macOS, Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4. Processing maliciously crafted web content may bypass Same Origin Policy.

Affected products

• Apple iPadOS: before 26.3.1 (fixed in 26.3.1)
• Apple iPhone OS: before 26.3.1 (fixed in 26.3.1)
• Apple macOS: before 26.3.1 (fixed in 26.3.1)

Published 2026-03-17. Last modified 2026-06-17.