CVE-2026-43748CWE-787

CVE-2026-43748

Critical · published July 28, 2026

CVSS v3.1

9.8

EPSS

Percentile

47.2

In the wild

Unconfirmed

What it is

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Tahoe 26.6. An app may be able to cause unexpected system termination.

The record

Technical detail

CVSS v3.1: 9.8 · CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0: Not supplied
EPSS: 0.00585 · 47.2th percentile
Weakness: CWE-787 · Out-of-bounds Write
Published: 2026-07-28T01:16Z

Affected products (2)

Product	Versions	Fixed in
apple/macos	≥ 15.0, < 15.7.8	15.7.8
apple/macos	≥ 26.0, < 26.6	26.6

References (3)

https://support.apple.com/en-us/128066 · [email protected]https://support.apple.com/en-us/128067 · [email protected]https://support.apple.com/en-us/128071 · [email protected]

EPSS history

Timeline

27 JUL 20:12Z
An out-of-bounds write issue was addressed with improved bounds checking
cvelistv5