Advisoriesby IbisAppleCVE-2026-86881
Apple iOS and iPadOS: improper certificate validation
Fix: upgrade to 26.7 or later (3 fixed versions below)
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 versions
| Package | Affected | Fixed in |
|---|---|---|
| iOS and iPadOS Product | < 26.7 | 26.7 |
| < 27 | 27 | |
| macOS Product | < 15.8 | 15.8 |
| < 26.7 | 26.7 | |
| < 27 | 27 | |
| tvOS Product | < 27 | 27 |
| visionOS Product | < 27 | 27 |
| watchOS Product | < 27 | 27 |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- Severity from
- CISA (its enrichment of the CVE record)
- Weakness
- CWE-295
- www.cve.org/CVERecord?id=CVE-2026-86881
- nvd.nist.gov/vuln/detail/CVE-2026-86881
- support.apple.com/en-us/149034
- support.apple.com/en-us/149035
- support.apple.com/en-us/149036
- support.apple.com/en-us/149037
- support.apple.com/en-us/149038
- support.apple.com/en-us/149041
- support.apple.com/en-us/149042
- support.apple.com/en-us/149043