Improper certificate validation in macOS - CVE-2026-86881
Published: September 15, 2026
Vulnerability identifier: #VU149860
CSH Severity: Low
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-86881
CWE-ID: CWE-295
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform MitM attack.
The vulnerability exists due to improper certificate validation in Security component. A remote attacker with a compromised intermediate certificate authority can issue certificates with arbitrary extended key usages.
Affected software
macOS
How to mitigate CVE-2026-86881
Install updates from vendor's website.
macOS - addressed in versions 26.7 25G229, 15.8 24H23