Out-of-bounds write in macOS - CVE-2026-43656
Published: May 12, 2026
Vulnerability identifier: #VU131053
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-43656
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local application to perform a denial of service (DoS) attack.
The vulnerability exists due to an out-of-bounds write in Quick Look. A local application can trick the victim into opening a specially crafted file and perform an unexpected app termination.
Affected software
macOS
Apple iOS
iPadOS
Apple iOS
iPadOS
How to mitigate CVE-2026-43656
Install update from vendor's website.
macOS - addressed in versions 26.5 25F71, 14.8.7 23J520, 15.7.7 24G720
Apple iOS - addressed in versions 18.7.9 22H355, 26.5 23F77
iPadOS - addressed in versions 18.7.9 22H355, 26.5 23F77
Apple iOS - addressed in versions 18.7.9 22H355, 26.5 23F77
iPadOS - addressed in versions 18.7.9 22H355, 26.5 23F77