CVE-2026-20643

CVSS 5.4 MEDIUMEPSS 0.4%CWE-20 CWE-346

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.4EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

17 Mar 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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

Affected products

Apple · iOS and iPadOS Apple · macOS Apple · Safari Apple · visionOS

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References

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