Improper input validation in macOS - CVE-2026-28821
Published: March 25, 2026
Vulnerability identifier: #VU124350
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-28821
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local application to escalate privileges on the system.
The vulnerability exists due to insufficient input validation in CoreServices. A local application can gain elevated privileges.
Affected software
macOS
How to mitigate CVE-2026-28821
Install update from vendor's website.
macOS - addressed in versions 26.4 25E246, 14.8.5 23J423, 15.7.5 24G624