CVE-2018-4277

7.5 highEPSS 1.9%

In iOS before 11.4.1, watchOS before 4.3.2, tvOS before 11.4.1, Safari before 11.1.1, macOS High Sierra before 10.13.6, a spoofing issue existed in the handling of URLs. This issue was addressed with improved input validation.

Severity

CVSS 3.0

7.5 high

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS: 1.9% chance of exploitation in the next 30 days; higher than 79% of CVEs (scores of 2026-10-31)
CWE: CWE-20
Published: 2019-01-11
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

apple:iphone_os
apple:mac_os_x
apple:safari
apple:tvos
apple:watchos

References

http://www.securitytracker.com/id/1041232
https://support.apple.com/HT208854
https://support.apple.com/HT208935
https://support.apple.com/HT208936
https://support.apple.com/HT208937

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