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TI-2026-76680 Aliases CVE-2026-86907GHSA-h5rr-v89q-r95x

Missing authorization in Apple macOS lets admins modify System Keychain

Priority LOW 19CWE-862Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-862.

Summary

An authorization flaw in Apple macOS lets a local user with administrator privileges modify the System Keychain. The issue stems from missing authorization checks (CWE-862). An attacker needs an account with admin rights on the affected Mac to exploit it.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

An authorization issue was addressed with improved entitlement checks. This issue is fixed in macOS Sequoia 15.8, macOS Tahoe 26.7. An app with admin privileges may be able to modify the System Keychain.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00141 3rd percentileScored 2026-11-07
Fix Fixed macOS (Apple): 15.8, 26.7

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 15.8; before 26.715.8, 26.7Patch availableCNA
  • macOS VendorApple Affected before 15.8; before 26.7 Fixed in 15.8, 26.7 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*before 15.8; 26.0 to before 26.7VulnerableApple
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions before 15.8; 26.0 to before 26.7 Vulnerable ·Apple

Remediation

Update macOS Sequoia to 15.8 or macOS Tahoe to 26.7, which fix the issue.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA macOS (Apple) Fixed in 15.8, 26.7

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apple macOS 15.8, 26.7

    4 records Highest priority Priority LOW 4 LOW

    Other records, highest priority first

    • TI-2026-76653 Apple macOS flaw lets apps gain higher privilegesPriority LOW 35
    • TI-2026-76707 Out-of-bounds write in Apple macOS lets apps crash the systemPriority LOW 24
    • TI-2026-76693 Apple iOS, iPadOS and macOS out-of-bounds write causes system terminationPriority LOW 24
    Show all 4 records →

Timeline

  1. 2026-10-20 Threatist record created from CVE-2026-86907
  2. 2026-10-20 CVSS score added · CISA ADP
  3. 2026-10-20 Weakness changed · CISA ADP
  4. 2026-10-20 CISA SSVC decision points changed
  5. 2026-10-20 Alias added: GHSA-h5rr-v89q-r95x

References

Advisory 2

  • 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