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.
Published: 2026-09-14
Score: 9.1 Critical
EPSS: < 1% Very Low
KEV: No
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Wed, 16 Sep 2026 18:45:00 +0000

Type Values Removed Values Added
First Time appeared Apple ipados
Apple iphone Os
CPEs cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
Vendors & Products Apple ipados
Apple iphone Os

Wed, 16 Sep 2026 13:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-295
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 16 Sep 2026 12:45:00 +0000

Type Values Removed Values Added
Title Certificate Validation Flaw Allowing Forged Extended Key Usage by Compromised Intermediate CA
Weaknesses CWE-379

Tue, 15 Sep 2026 12:00:00 +0000

Type Values Removed Values Added
Title Certificate Validation Flaw Allowing Forged Extended Key Usage by Compromised Intermediate CA
Weaknesses CWE-379

Tue, 15 Sep 2026 03:45:00 +0000

Type Values Removed Values Added
First Time appeared Apple
Apple ios And Ipados
Apple macos
Apple tvos
Apple visionos
Apple watchos
Vendors & Products Apple
Apple ios And Ipados
Apple macos
Apple tvos
Apple visionos
Apple watchos

Mon, 14 Sep 2026 21:00:00 +0000

Type Values Removed Values Added
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.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: apple

Published:

Updated: 2026-09-16T12:57:12.228Z

Reserved: 2026-09-08T16:43:41.871Z

Link: CVE-2026-86881

cve-icon Vulnrichment

Updated: 2026-09-16T12:56:51.219Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-14T21:17:39.010

Modified: 2026-09-16T18:25:22.767

Link: CVE-2026-86881

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-16T12:30:08Z

Weaknesses