CVE-2026-20643

Public on 2026-03-17
Modified on 2026-03-30
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.
Severity
Medium severity
Medium
See what this means
CVSS v3 Base Score
5.4
See breakdown

Affected Packages

Platform Package Release Date Advisory Status
Amazon Linux 2 - Core webkitgtk3 No Fix Planned
Amazon Linux 2 - Core webkitgtk4 Pending Fix

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 5.4 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

References

FAQs regarding Amazon Linux ALAS/CVE Severity Red Hat: CVE-2026-20643 Mitre: CVE-2026-20643