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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Apple | iOS and iPadOS | < 26.7, < 27 | 26.7 |
| Apple | macOS | < 15.8, < 26.7, < 27 | 15.8 |
| Apple | tvOS | < 27 | 27 |
| Apple | visionOS | < 27 | 27 |
| Apple | watchOS | < 27 | 27 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 1 repository
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0xcrypto/CVE-2026-86881 ★ 0 · Oct 5, 2026
Analysis of CVE-2026-86881: An attacker with a compromised intermediate certificate authority may be able to issue certificates with arbitrary extended key usages
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 3
- WID-SEC-2026-3352 Apple iOS, iPadOS, macOS Tahoe, macOS Golden Gate, macOS Sequoia und Safari: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 26, 2026
- NCSC-2026-0371 Kwetsbaarheden verholpen in Apple macOS en Samba door Apple en Samba NCSC-NL (Netherlands) · Sep 15, 2026
- NCSC-2026-0370 Kwetsbaarheden verholpen in Apple iOS en iPadOS NCSC-NL (Netherlands) · Sep 15, 2026
References
- https://support.apple.com/en-us/149034
- https://support.apple.com/en-us/149035
- https://support.apple.com/en-us/149036
- https://support.apple.com/en-us/149037
- https://support.apple.com/en-us/149038
- https://support.apple.com/en-us/149041
- https://support.apple.com/en-us/149042
- https://support.apple.com/en-us/149043