What’s Vulnerable › Vulnerabilities

CVE-2018-4274

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-04-03 · updated 2026-06-17
• Weakness: CWE-20

Description

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

How to fix

Upgrade to a fixed version: Apple Iphone Os 11.4.1; Apple Safari 11.1.2. Check the vendor advisory for mitigations.

References

• https://support.apple.com/kb/HT208934
• https://support.apple.com/kb/HT208938
• https://support.apple.com/kb/HT208934
• https://support.apple.com/kb/HT208938

Get alerted when CVE-2018-4274 or the next vulnerability affects your stack