CVE-2026-20643

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.

CVSS v3.1

5.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

EPSS

0.35% chance of exploitation in the next 30 days, 28th percentile

Published

2026-03-17

Updated

2026-08-17

Proof-of-concept exploits (1)

• Fliv/CVE-2026-206433★ · 2026-03-20

References

• CVE Record
• NVD entry

Related

• CVE-2026-2064
• CVE-2026-2065
• CVE-2026-20637
• CVE-2026-2066
• CVE-2026-2063
• CVE-2026-20660