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CVE-2026-20643unknown

A cross-origin issue in the Navigation API was addressed with improved input validation.

Impact

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.

Source excerpt · apple

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

Apple · iOS and iPadOS

Version / rangeSource status
0 to before 18.7.7affected
0 to before 26.3.1 (a)affected
0 to before 26.4affected
apple version evidence

Apple · macOS

Version / rangeSource status
0 to before 26.3.1 (a)affected
0 to before 26.3.2 (a)affected
0 to before 26.4affected
apple version evidence

Original source 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.

References