CVE-2018-4274: Apple iPhone OS

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

A spoofing issue existed in the handling of URLs. This issue was addressed with improved input validation. This issue affected versions prior to iOS 11.4.1, Safari 11.1.2.

Affected products

• Apple iPhone OS: before 11.4.1 (fixed in 11.4.1)
• Apple Safari: before 11.1.2 (fixed in 11.1.2)

Published 2019-04-03. Last modified 2026-06-17.