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CVE-2026-86881 (GCVE-0-2026-86881)

Vulnerability from cvelistv5 – Published: 2026-09-14 20:47 – Updated: 2026-09-16 12:57
VLAI
Summary
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.
Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 12:57 UTC
CWE
  • An attacker with a compromised intermediate certificate authority may be able to issue certificates with arbitrary extended key usages
  • CWE-295 - Improper Certificate Validation
Assigner
References
Impacted products
Vendor Product Version CPE status
Apple iOS and iPadOS Affected: 0 , < 26.7 (custom)
Affected: 0 , < 27 (custom)
guessed Create a notification for this product.
Apple macOS Affected: 0 , < 15.8 (custom)
Affected: 0 , < 26.7 (custom)
Affected: 0 , < 27 (custom)
guessed Create a notification for this product.
Apple tvOS Affected: 0 , < 27 (custom)
guessed Create a notification for this product.
Apple visionOS Affected: 0 , < 27 (custom)
guessed Create a notification for this product.
Apple watchOS Affected: 0 , < 27 (custom)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


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