CVE-2018-4277 json
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 ex…
published 2019-01-11 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-16063
- cvss
- 7.5
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.9%
- EPSS 1.9% chance of exploitation in 30 days, percentile 79%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- apple safari 11.1.1
- apple iphone_os 11.4.1
- apple mac_os_x 10.13.6
- apple tvos 11.4.1
- apple watchos 4.3.2
Exploit prediction
1.87% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:P/A:N |
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
support.apple.com
/HT208937
vendor-advisory
- support.apple.com /HT208854
- support.apple.com /HT208935
-
securitytracker.com
/id/1041232
vdb-entry, third-party-advisory
- support.apple.com /HT208936
- support.apple.com /HT208938
Sources
- CVE List CVE-2018-4277
- NVD CVE-2018-4277
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.