CVE-2018-4256 json
In macOS High Sierra before 10.13.5, an out-of-bounds read was addressed with improved input validation.
published 2019-01-11 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-16042
- cvss
- 5.5
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 22%
- public exploits
- 0
- none known
Summary
In macOS High Sierra before 10.13.5, an out-of-bounds read was addressed with improved input validation.
Patch / fix
- apple mac_os_x 10.13.5
Exploit prediction
0.29% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 5.5 | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 2.1 | AV:L/AC:L/Au:N/C:P/I:N/A:N |
Classification
- Weakness
-
- CWE-125 Out-of-bounds Read
References
-
support.apple.com
/HT208849
vendor-advisory
Sources
- CVE List CVE-2018-4256
- NVD CVE-2018-4256
Fencer Intel 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.