VulnerabilityModified
CVE-2026-20643
Processing maliciously crafted web content may bypass Same Origin Policy.
MEDIUM 5.4EPSS 0.35%
Does this matter?
Lower severity and a low EPSS score (0.35%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
- EPSS
- 0.35% probability · 29th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20, CWE-346
- Affected
- apple/ipados · apple/iphone os · apple/macos
- Source
- product-security@apple.com
References
- https://support.apple.com/en-us/126604Release Notes, Vendor Advisory
- 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
- http://seclists.org/fulldisclosure/2026/Mar/10
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.