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TI-2026-80711 Aliases CVE-2026-86929GHSA-89xf-8j98-5857

Out-of-bounds write in Apple macOS lets crafted files run code

Priority MEDIUM 41CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

Apple macOS before 15.8.2, before 26.7.2, and before 27 are affected. The flaw is an out-of-bounds write, fixed with improved bounds checking. If a user opens a maliciously crafted file, processing it may let an attacker run arbitrary code.

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

Description from the CNA

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. Processing a maliciously crafted file may lead to arbitrary code execution.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00653 51st percentileScored 2026-11-07
Fix Fixed macOS (Apple): 15.8.2, 26.7.2, 27

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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 15.8.2; before 26.7.2; before 2715.8.2, 26.7.2, 27Patch availableCNA
  • macOS VendorApple Affected before 15.8.2; before 26.7.2; before 27 Fixed in 15.8.2, 26.7.2, 27 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*15.0 to before 15.8.2; 26.0 to before 26.7.2VulnerableApple
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions 15.0 to before 15.8.2; 26.0 to before 26.7.2 Vulnerable ·Apple

Remediation

Update macOS to 15.8.2, 26.7.2, or 27, the fixed version for each release line.

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

  • Fix · CNA macOS (Apple) Fixed in 15.8.2, 26.7.2, 27

Fixed in the same release

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

  • Release ·

    Apple macOS 15.8.2, 26.7.2, 27

    20 records Highest priority Priority MEDIUM 1 MEDIUM, 19 LOW

    Other records, highest priority first

    • TI-2026-80701 Use after free in Apple macOS allows sandbox escape to rootPriority LOW 39
    • TI-2026-80688 Apple iOS, iPadOS and macOS flaw lets apps break out of sandboxPriority LOW 38
    • TI-2026-80720 Memory flaw in Apple macOS enables pointer authentication bypassPriority LOW 36
    Show all 20 records →

Timeline

  1. 2026-10-26 Threatist record created from CVE-2026-86929
  2. 2026-10-26 CVSS score added · CISA ADP
  3. 2026-10-26 Weakness changed · CISA ADP
  4. 2026-10-26 CISA SSVC decision points changed
  5. 2026-10-27 CISA SSVC decision points changed
  6. 2026-10-27 Alias added: GHSA-89xf-8j98-5857
  7. 2026-10-27 Priority changed: LOW → MEDIUM

References

Advisory 3

  • 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