A certificate validation issue was addressed with improved certificate validation. (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 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.
AI Analysis
Technical Summary
CVE-2026-86881 describes a certificate validation vulnerability affecting several Apple operating systems. The flaw involves insufficient validation of certificates, which could be exploited by an attacker who has compromised an intermediate certificate authority to issue certificates with arbitrary extended key usages. This could undermine the trust model of certificate-based authentication and encryption. Apple has fixed the issue by improving certificate validation in the specified OS versions.
Potential Impact
An attacker with control over a compromised intermediate certificate authority could issue certificates with arbitrary extended key usages, potentially enabling misuse of certificates for unauthorized purposes. This undermines the security guarantees of certificate validation in affected Apple operating systems. However, exploitation requires prior compromise of an intermediate CA, which is a significant prerequisite.
Mitigation Recommendations
The vulnerability 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, and watchOS 27. Users and administrators should update to these versions or later to remediate the issue.
A certificate validation issue was addressed with improved certificate validation. (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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-86881 describes a certificate validation vulnerability affecting several Apple operating systems. The flaw involves insufficient validation of certificates, which could be exploited by an attacker who has compromised an intermediate certificate authority to issue certificates with arbitrary extended key usages. This could undermine the trust model of certificate-based authentication and encryption. Apple has fixed the issue by improving certificate validation in the specified OS versions.
Potential Impact
An attacker with control over a compromised intermediate certificate authority could issue certificates with arbitrary extended key usages, potentially enabling misuse of certificates for unauthorized purposes. This undermines the security guarantees of certificate validation in affected Apple operating systems. However, exploitation requires prior compromise of an intermediate CA, which is a significant prerequisite.
Mitigation Recommendations
The vulnerability 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, and watchOS 27. Users and administrators should update to these versions or later to remediate the issue.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-ggg8-xqj3-2v49
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-86881"]
- State
- PUBLISHED
Threat ID: 6aa8a18055bf5e2cf5f3d1f7
Added to database: 09/15/2026, 01:38:08 UTC
Last enriched: 09/15/2026, 01:45:11 UTC
Last updated: 09/15/2026, 03:01:22 UTC
Views: 2
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