CVE-2026-86881: A certificate validation issue was addressed with improved certificate validation. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS…

PriorityP348critical9.1CVSS 3.1

AVNACLPRNUINSUCHIHAN

EPSS

0.40%

32.9th percentile

A certificate validation issue was addressed with improved certificate validation. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7, tvOS 27, visionOS 27, watchOS 27. An attacker with a compromised intermediate certificate authority may be able to issue certificates with arbitrary extended key usages.

Affected

15 ranges

Vendor	Product	Version range	Fixed in
apple	ios_and_ipados	< 26.7	26.7
apple	ios_and_ipados	< 27	27
apple	ipados	< 26.7	26.7
apple	iphone_os	< 26.7	26.7
apple	macos	< 15.8	15.8
apple	macos	< 26.7	26.7
apple	macos	< 27	27
apple	macos	>= 15.0 < 15.8	15.8
apple	macos	>= 26.0 < 26.7	26.7
apple	tvos	< 27	27
apple	tvos	< 27.0	27.0
apple	visionos	< 27	27
apple	visionos	< 27.0	27.0
apple	watchos	< 27	27
apple	watchos	< 27.0	27.0

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