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TI-2026-16754 Aliases CVE-2026-20699GHSA-943h-6fx4-c427

Improper signature verification in Apple macOS

Priority LOW 27CWE-347Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-347.

Summary

A downgrade issue affecting Intel-based Mac computers was addressed with additional code-signing restrictions. This issue is fixed in macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.3, macOS Tahoe 26.4. An app may be able to access user-sensitive data.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00142 3rd percentileScored 2026-11-07
Fix Fixed macOS (Apple): 14.8.5, 15.7.5, 26.3 +1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApplemacOSbefore 14.8.5; before 15.7.5; before 26.3; before 26.414.8.5, 15.7.5, 26.3, 26.4Patch availableCNA
  • macOS VendorApple Affected before 14.8.5; before 15.7.5; before 26.3; before 26.4 Fixed in 14.8.5, 15.7.5, 26.3, 26.4 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*14.0 to before 14.8.5; 15.0 to before 15.7.5; 26.0 to before 26.3VulnerableApple
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions 14.0 to before 14.8.5; 15.0 to before 15.7.5; 26.0 to before 26.3 Vulnerable ·Apple

Remediation

  • Fix · CNA macOS (Apple) Fixed in 14.8.5, 15.7.5, 26.3, 26.4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-20699
  2. 2026-10-03 Alias added: GHSA-943h-6fx4-c427

References

Advisory 4

  • TI-2026-46583 Improper authentication in Apple macOS KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-28008 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
  • TI-2025-22441 Apple iOS and iPadOS: An attacker with arbitrary read and write capability may be able to… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-22440 Memory corruption in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-17951 Out-of-bounds write in Apple Safari KEVCVSS 3.1CRITICAL 10.0
  • TI-2025-17847 Use after free in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
See all 3490 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences