CVE-2016-4590: Apple Safari

Medium severity, CVSS 5.4. EPSS: 1.5% chance of exploitation in the next 30 days.

WebKit in Apple iOS before 9.3.3 and Safari before 9.1.2 mishandles about: URLs, which allows remote attackers to bypass the Same Origin Policy via a crafted web site.

Affected products

• Apple Safari: up to and including 9.1.1
• Apple Webkit: any version

Published 2016-07-22. Last modified 2026-06-17.