CVE-2026-20643

State: Published
Severity: 5.4 Medium
Published: Mar 17, 2026
Updated: Oct 26, 2026
Reserved: Nov 11, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	5.4 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N	CISA-ADP

Weaknesses

CWE-20 Improper Input Validation
CWE-346 Origin Validation Error

Affected Products

Product	Versions
SafariApple	before 26.4Affected
iOS and iPadOSApple	before 18.7.7Affected before 26.3.1 (a)Affected before 26.4Affected
macOSApple	before 26.3.1 (a)Affected before 26.3.2 (a)Affected before 26.4Affected
visionOSApple	before 26.4Affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.