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TI-2026-76699 Aliases CVE-2026-86959GHSA-77qf-m27w-cvvj

Improper input validation in Apple iOS, iPadOS and macOS crashes processes

Priority LOW 20CWE-20Published · Updated

Key facts

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

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

Summary

Apple iOS and iPadOS before 26.7 and before 27, and macOS before 15.8, before 26.7 and before 27, are affected. Improper input validation (CWE-20) lets a maliciously crafted image cause a process to terminate unexpectedly. A remote unauthenticated attacker can trigger it when a user processes such an image, with impact limited to availability.

Written with Claude Haiku 5.5 from the sources below · 2026-10-31

Description from the CNA

An input validation issue was addressed with improved input 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. Processing a maliciously crafted image may lead to unexpected process termination.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00287 21st percentileScored 2026-11-07
Fix Fixed iOS and iPadOS (Apple): 26.7, 27macOS (Apple): 15.8, 26.7, 27

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
AppleiOS and iPadOSbefore 26.7; before 2726.7, 27Patch availableCNA
ApplemacOSbefore 15.8; before 26.7; before 2715.8, 26.7, 27Patch availableCNA
  • iOS and iPadOS VendorApple Affected before 26.7; before 27 Fixed in 26.7, 27 Patch available CNA
  • macOS VendorApple Affected before 15.8; before 26.7; before 27 Fixed in 15.8, 26.7, 27 Patch available CNA

Remediation

Apple fixes this in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS 15.8, macOS 26.7 and macOS 27.

Written with Claude Haiku 5.5 from the sources below · 2026-10-31

  • Fix · CNA iOS and iPadOS (Apple) Fixed in 26.7, 27
  • Fix · CNA macOS (Apple) Fixed in 15.8, 26.7, 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, 26.7, 27

    15 records Highest priority Priority MEDIUM 3 MEDIUM, 12 LOW

    Other records, highest priority first

    • TI-2026-76675 Authentication issue in Apple macOS lets attackers impersonate usersPriority MEDIUM 48
    • TI-2026-76672 Improper checks in Apple macOS lead to unexpected software executionPriority MEDIUM 41
    • TI-2026-76685 Stack overflow in Apple iOS, macOS and visionOS allows code executionPriority MEDIUM 40
    Show all 15 records →
  • Release ·

    Apple iOS and iPadOS 26.7, 27

    8 records Highest priority Priority MEDIUM 1 MEDIUM, 7 LOW

    Other records, highest priority first

    • TI-2026-76685 Stack overflow in Apple iOS, macOS and visionOS allows code executionPriority MEDIUM 40
    • TI-2026-76698 Out-of-bounds read in Apple operating systems can crash the systemPriority LOW 29
    • TI-2026-76674 Out-of-bounds write in Apple operating systems can crash devicesPriority LOW 29
    Show all 8 records →

Timeline

  1. 2026-10-20 Threatist record created from CVE-2026-86959
  2. 2026-10-30 CVSS score added · CISA ADP
  3. 2026-10-30 Weakness changed · CISA ADP
  4. 2026-10-30 CISA SSVC decision points changed
  5. 2026-10-30 Alias added: GHSA-77qf-m27w-cvvj

References

Other 5

  • 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 9536 →

Sources

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