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TI-2026-16733 Aliases CVE-2026-20677GHSA-qjq9-mpcc-f8cr

Time-of-check time-of-use race condition in Apple iOS and iPadOS

Priority MEDIUM 41CWE-367Published · Updated

Key facts

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

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

Summary

A race condition was addressed with improved handling of symbolic links. This issue is fixed in iOS 18.7.5 and iPadOS 18.7.5, iOS 26.3 and iPadOS 26.3, macOS Sequoia 15.7.4, macOS Sonoma 14.8.4, macOS Tahoe 26.3, visionOS 26.3. A shortcut may be able to bypass sandbox restrictions.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00323 25th percentileScored 2026-11-07
Fix Fixed iOS and iPadOS (Apple): 18.7.5, 26.3macOS (Apple): 14.8.4, 15.7.4, 26.3+1 more product

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
AppleiOS and iPadOSbefore 18.7.5; before 26.318.7.5, 26.3Patch availableCNA
ApplemacOSbefore 14.8.4; before 15.7.4; before 26.314.8.4, 15.7.4, 26.3Patch availableCNA
ApplevisionOSbefore 26.326.3Patch availableCNA
  • iOS and iPadOS VendorApple Affected before 18.7.5; before 26.3 Fixed in 18.7.5, 26.3 Patch available CNA
  • macOS VendorApple Affected before 14.8.4; before 15.7.4; before 26.3 Fixed in 14.8.4, 15.7.4, 26.3 Patch available CNA
  • visionOS VendorApple Affected before 26.3 Fixed in 26.3 Patch available CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*before 18.7.5; 26.0 to before 26.3VulnerableApple
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*before 18.7.5; 26.0 to before 26.3VulnerableApple
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*before 14.8.4; 26.0 to before 26.3VulnerableApple
cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:*before 26.3VulnerableApple
  • cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 18.7.5; 26.0 to before 26.3 Vulnerable ·Apple
  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 18.7.5; 26.0 to before 26.3 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions before 14.8.4; 26.0 to before 26.3 Vulnerable ·Apple
  • cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:* Versions before 26.3 Vulnerable ·Apple

Remediation

  • Fix · CNA iOS and iPadOS (Apple) Fixed in 18.7.5, 26.3
  • Fix · CNA macOS (Apple) Fixed in 14.8.4, 15.7.4, 26.3
  • Fix · CNA visionOS (Apple) Fixed in 26.3

Fixed in the same release

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

  • Release ·

    Apple visionOS 26.3

    26 records Highest priority Priority CRITICAL 1 CRITICAL, 4 MEDIUM, 21 LOW

    Other records, highest priority first

    • TI-2026-16755 Memory corruption in Apple iOS and iPadOSPriority CRITICAL 93
    • TI-2026-16673 Out-of-bounds write in Apple iOS and iPadOSPriority MEDIUM 41
    • TI-2026-16709 Uncontrolled resource consumption in Apple SafariPriority MEDIUM 40
    Show all 26 records →
  • Release ·

    Apple macOS 14.8.4, 15.7.4, 26.3

    25 records Highest priority Priority MEDIUM 1 MEDIUM, 24 LOW

    Other records, highest priority first

    • TI-2026-16723 Protection mechanism failure in Apple iOS and iPadOSPriority LOW 39
    • TI-2026-16731 Out-of-bounds read in Apple iOS and iPadOSPriority LOW 36
    • TI-2026-16668 Out-of-bounds read in Apple iOS and iPadOSPriority LOW 36
    Show all 25 records →
Show 1 more group
  • Release ·

    Apple iOS and iPadOS 18.7.5, 26.3

    23 records Highest priority Priority MEDIUM 2 MEDIUM, 21 LOW

    Other records, highest priority first

    • TI-2026-16709 Uncontrolled resource consumption in Apple SafariPriority MEDIUM 40
    • TI-2026-16731 Out-of-bounds read in Apple iOS and iPadOSPriority LOW 36
    • TI-2026-16668 Out-of-bounds read in Apple iOS and iPadOSPriority LOW 36
    Show all 23 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-20677
  2. 2026-10-03 Alias added: GHSA-qjq9-mpcc-f8cr

References

Advisory 5

Other 1

  • 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
  • TI-2022-06854 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8
See all 2382 →

Sources

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