High (8.1) in apple. EPSS 1.0% chance of exploitation in the next 30 days.
The issue was addressed with improved input validation. This issue is fixed in Safari 18.4, iOS 18.4 and iPadOS 18.4, macOS Sequoia 15.4, visionOS 2.4, watchOS 11.4. A malicious website may be able to claim WebAuthn credentials from another website that shares a registrable suffix.
Severity
CVSS 3.1
8.1 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
EPSS
1.0% chance of exploitation in the next 30 days; higher than 64% of CVEs (scores of 2026-10-31)