Improper input validation in macOS - CVE-2026-4424

Vulnerability identifier: #VU143738

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-4424

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to improper input validation in libarchive when parsing input. A remote attacker can supply specially crafted archive data to disclose sensitive information.

macOS
visionOS
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Apple iOS
iPadOS
Optim
libarchive (Red Hat package)

Install update from vendor's website.

macOS - addressed in versions 26.6 25G72, 14.8.8 23J620, 15.7.8 24G824
Optim - update to 2.0.0
visionOS - update to 26.6
Apple iOS - addressed in versions 18.7.10 22H374, 26.6 23G71
iPadOS - addressed in versions 18.7.10 22H374, 26.6 23G71
libarchive (Red Hat package) - update to 3.7.7-8.el10_1

• https://support.apple.com/en-us/128067

• Multiple vulnerabilities in macOS Tahoe
• Multiple vulnerabilities in macOS Sequoia
• Multiple vulnerabilities in macOS Sonoma
• Red Hat Enterprise Linux 10 update for libarchive
• Multiple vulnerabilities in iOS 26 and iPadOS 26
• Multiple vulnerabilities in Apple visionOS
• Multiple vulnerabilities in iOS 18 and iPadOS 18
• Multiple vulnerabilities in IBM Optim