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Critical severity9.1NVD Advisory· Published Sep 14, 2026· Updated Sep 16, 2026

CVE-2026-86881

CVE-2026-86881

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

9
  • Apple Inc./Ipados2 versions
    cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*range: <26.7
    • (no CPE)range: 26.7, 27
  • Apple Inc./Iphone OS
    cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
    Range: <26.7
  • Apple Inc./macOS2 versions
    cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*range: >=15.0,<15.8
    • (no CPE)range: Golden Gate 27, Sequoia 15.8, Tahoe 26.7
  • Apple Inc./tvOS
    cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
    Range: <27.0
  • Apple Inc./Visionos
    cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:*
    Range: <27.0
  • Apple Inc./watchOS
    cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
    Range: <27.0
  • Apple Inc./iOSllm-fuzzy
    Range: 26.7, 27

Patches

Vulnerability mechanics

References

8

News mentions

4