Improper input validation in macOS - CVE-2026-84588
Published: September 15, 2026
Vulnerability identifier: #VU149888
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-2026-84588
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to improper input validation in the kernel when handling input. A local user can provide crafted input to escalate privileges on the system.
Affected software
macOS
How to mitigate CVE-2026-84588
Install update from vendor's website.
macOS - update to 27.0 26A428