CVE-2026-20643

MEDIUM 5.4

CVSS Score

5.4

EPSS Score

0.0%

EPSS Percentile

0th

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.

Vendor	apple
Product	safari
Ecosystems	iOS macOS
Industries	Technology
Published	Mar 17, 2026
Last Updated	Apr 2, 2026

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Affected Versions

Apple / Safari

0 < 26.4

Apple / iOS and iPadOS

0 < 18.7.7 0 < 26.3.1 (a) 0 < 26.4

Apple / macOS

0 < 26.3.1 (a) 0 < 26.3.2 (a) 0 < 26.4

Apple / visionOS

0 < 26.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

support.apple.com: https://support.apple.com/en-us/126604 support.apple.com: https://support.apple.com/en-us/126792 support.apple.com: https://support.apple.com/en-us/126793 support.apple.com: https://support.apple.com/en-us/126794 support.apple.com: https://support.apple.com/en-us/126799 support.apple.com: https://support.apple.com/en-us/126800 seclists.org: http://seclists.org/fulldisclosure/2026/Mar/10