Improper input validation in macOS - CVE-2026-43818
Published: August 17, 2026
Vulnerability identifier: #VU143706
CSH Severity: Medium
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-43818
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to insufficient input validation in ImageIO. A remote attacker can trick the victim into opening a specially crafted file and perform arbitrary code execution.
Affected software
macOS
iPadOS
Apple iOS
iPadOS
Apple iOS
How to mitigate CVE-2026-43818
Install update from vendor's website.
macOS - addressed in versions 26.6 25G72, 14.8.8 23J620, 15.7.8 24G824
iPadOS - update to 26.6 23G71
Apple iOS - update to 26.6 23G71
iPadOS - update to 26.6 23G71
Apple iOS - update to 26.6 23G71