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9.1 Critical

CVE-2026-86881 A certificate validation issue was addressed with improved certificate validation

Description

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 products and versions

Product Affected versions Fixed in
iOS and iPadOS 27 earliest → < 27 27
iOS and iPadOS 26.7 earliest → < 26.7 26.7
macOS 27 earliest → < 27 27
macOS 26.7 earliest → < 26.7 26.7
macOS 15.8 earliest → < 15.8 15.8
tvOS 27 earliest → < 27 27
visionOS 27 earliest → < 27 27
watchOS 27 earliest → < 27 27

References

Timeline

  1. Published
  2. Last modified

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The 2049 CVEs of iOS and iPadOS →
CVE-2026-86925 An authorization issue was addressed with improved state management 5.5 Medium CVE-2026-84627 A buffer overflow was addressed with improved bounds checking 7.8 High CVE-2026-86972 A buffer overflow was addressed with improved size validation 7.8 High CVE-2026-113912 An out-of-bounds access issue was addressed with improved bounds checking 7.1 High
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