Unrated severityNVD Advisory· Published Mar 17, 2026· Updated Apr 2, 2026

CVE-2026-20643

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

Apple Inc./macOSllm-fuzzy2 versions
<26.4+ 1 more
- (no CPE)range: <26.4
- (no CPE)range: 0
Apple Inc./Safarillm-fuzzy2 versions
<26.4+ 1 more
- (no CPE)range: <26.4
- (no CPE)range: 0
Cisco Systems, Inc./Cisco iOSllm-fuzzy
Range: <18.7.7
Apple Inc./Visionosv5
Range: 0
Apple/iOS and iPadOSv5
Range: 0

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

support.apple.com/en-us/126604mitre
support.apple.com/en-us/126792mitre
support.apple.com/en-us/126793mitre
support.apple.com/en-us/126794mitre
support.apple.com/en-us/126799mitre
support.apple.com/en-us/126800mitre

News mentions

No linked articles in our index yet.

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