5.4
Medium
CVE-2026-20643 A cross-origin issue in the Navigation API was addressed with improved input validation
Description
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 and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Safari 26.4 | earliest → < 26.4 | 26.4 |
| iOS and iPadOS 26.4 | earliest → < 26.4 | 26.4 |
| iOS and iPadOS 18.7 | earliest → < 18.7.7 | 18.7.7 |
| macOS 26.4 | earliest → < 26.4 | 26.4 |
| visionOS 26.4 | earliest → < 26.4 | 26.4 |
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