CVE-2023-40451: Apple Safari

High severity, CVSS 8.8. EPSS: 1.1% chance of exploitation in the next 30 days.

This issue was addressed with improved iframe sandbox enforcement. This issue is fixed in Safari 17. An attacker with JavaScript execution may be able to execute arbitrary code.

Affected products

• Apple Safari: before 17.0 (fixed in 17.0)

Published 2023-09-27. Last modified 2026-06-17.