Improper limitation of a pathname to a restricted directory ('path traversal') in macOS - CVE-2026-20660

Vulnerability identifier: #VU122667

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-2026-20660

CWE-ID: CWE-22

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to incorrect handling of path names in CFNetwork. A local user can trick the victim into opening a specially crafted file and write arbitrary files.

macOS
visionOS
iPadOS
Apple iOS
Apple Safari

Install update from vendor's website.

macOS - addressed in versions 26.3 25D125, 14.8.4 23J319, 15.7.5 24G624
visionOS - update to 26.3
iPadOS - addressed in versions 18.7.5 22H311, 26.3 23D127
Apple iOS - addressed in versions 18.7.5 22H311, 26.3 23D127
Apple Safari - update to 26.3

• https://support.apple.com/en-us/126348

• Multiple vulnerabilities in Apple macOS Tahoe
• Multiple vulnerabilities in Apple macOS Sonoma
• Multiple vulnerabilities in Apple visionOS
• Multiple vulnerabilities in Apple iOS 26 and iPadOS 26
• Multiple vulnerabilities in Apple iOS 18 and iPadOS 18
• Multiple vulnerabilities in Apple Safari
• Multiple vulnerabilities in macOS Sequoia