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.
Key facts
- CVSS score
- 9.1 (v3.1)
- Severity
- CRITICAL
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N- Weakness (CWE)
- CWE-295
- EPSS score
- 0.4% (32th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2026-77977)
- Published
- September 14, 2026
- NVD last modified
- September 16, 2026
- Status
- Analyzed
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2026-77977 in the EU Vulnerability Database. Last updated in EUVD on September 16, 2026.
View on the EU Vulnerability DatabaseAffected products
- apple / ipados
- apple / iphone os
- apple / macos
- apple / tvos
- apple / visionos
- apple / watchos
Certified products that may be affected
23 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.
- Apple macOS 26 Tahoe: FileVault - Apple Inc. - Common Criteria CCEVS-VR-VID-11696-2026 - active
- Apple macOS 26 Tahoe - Apple Inc. - Common Criteria CCEVS-VR-VID-11695-2026 - active
- Apple macOS 15 Sequoia - Apple Inc. - Common Criteria CCEVS-VR-VID-11648-2026 - active
- Strong Customer Authentication for Apple Pay on MacBook Air 2024 with M3running macOS Sequoia 15.4 - Apple Inc. - Common Criteria 2025-11-INF-4674 - active
- Apple iOS 18: iPhone - Apple Inc. - Common Criteria CCEVS-VR-VID-11623-2025 - active
See all 23 in the Security Certifications Explorer.
References
- https://support.apple.com/en-us/149034(Release Notes, Vendor Advisory)
- https://support.apple.com/en-us/149035(Release Notes, Vendor Advisory)
- https://support.apple.com/en-us/149036(Release Notes, Vendor Advisory)
- https://support.apple.com/en-us/149037(Release Notes, Vendor Advisory)
- https://support.apple.com/en-us/149038(Release Notes, Vendor Advisory)
- https://support.apple.com/en-us/149041(Release Notes, Vendor Advisory)
- https://support.apple.com/en-us/149042(Release Notes, Vendor Advisory)
- https://support.apple.com/en-us/149043(Release Notes, Vendor Advisory)
Last updated September 18, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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