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TI-2026-23166 Aliases CVE-2026-28991GHSA-778p-qw96-fmjp

Out-of-bounds read in Apple iOS and iPadOS

Priority LOW 34CWE-125Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.

Summary

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in iOS 26.5 and iPadOS 26.5, macOS Sequoia 15.8.2, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. An app may be able to cause a denial-of-service.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0056 46th percentileScored 2026-11-07
Fix Fixed iOS and iPadOS (Apple): 26.5macOS (Apple): 15.8.2, 26.5+3 more products

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 26.526.5Patch availableCNA
ApplemacOSbefore 15.8.2; before 26.515.8.2, 26.5Patch availableCNA
AppletvOSbefore 26.526.5Patch availableCNA
ApplevisionOSbefore 26.526.5Patch availableCNA
ApplewatchOSbefore 26.526.5Patch availableCNA
  • iOS and iPadOS VendorApple Affected before 26.5 Fixed in 26.5 Patch available CNA
  • macOS VendorApple Affected before 15.8.2; before 26.5 Fixed in 15.8.2, 26.5 Patch available CNA
  • tvOS VendorApple Affected before 26.5 Fixed in 26.5 Patch available CNA
  • visionOS VendorApple Affected before 26.5 Fixed in 26.5 Patch available CNA
  • watchOS VendorApple Affected before 26.5 Fixed in 26.5 Patch available CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*before 26.5VulnerableApple
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*before 26.5VulnerableApple
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*26.0 to before 26.5VulnerableApple
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*before 26.5VulnerableApple
cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:*before 26.5VulnerableApple
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*before 26.5VulnerableApple
  • cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 26.5 Vulnerable ·Apple
  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 26.5 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions 26.0 to before 26.5 Vulnerable ·Apple
  • cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* Versions before 26.5 Vulnerable ·Apple
  • cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:* Versions before 26.5 Vulnerable ·Apple
  • cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions before 26.5 Vulnerable ·Apple

Remediation

  • Fix · CNA iOS and iPadOS (Apple) Fixed in 26.5
  • Fix · CNA macOS (Apple) Fixed in 15.8.2, 26.5
  • Fix · CNA tvOS (Apple) Fixed in 26.5
  • Fix · CNA visionOS (Apple) Fixed in 26.5
  • Fix · CNA watchOS (Apple) Fixed in 26.5

Fixed in the same release

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

  • Release ·

    Apple visionOS 26.5

    46 records Highest priority Priority MEDIUM 7 MEDIUM, 39 LOW

    Other records, highest priority first

    • TI-2026-23134 Memory corruption in Apple SafariPriority MEDIUM 41
    • TI-2026-23121 Memory corruption in Apple iOS and iPadOSPriority MEDIUM 41
    • TI-2026-23040 Memory corruption in Apple SafariPriority MEDIUM 41
    Show all 46 records →
  • Release ·

    Apple tvOS 26.5

    44 records Highest priority Priority MEDIUM 6 MEDIUM, 38 LOW

    Other records, highest priority first

    • TI-2026-23134 Memory corruption in Apple SafariPriority MEDIUM 41
    • TI-2026-23121 Memory corruption in Apple iOS and iPadOSPriority MEDIUM 41
    • TI-2026-23040 Memory corruption in Apple SafariPriority MEDIUM 41
    Show all 44 records →
Show 2 more groups
  • Release ·

    Apple watchOS 26.5

    41 records Highest priority Priority MEDIUM 5 MEDIUM, 36 LOW

    Other records, highest priority first

    • TI-2026-23134 Memory corruption in Apple SafariPriority MEDIUM 41
    • TI-2026-23040 Memory corruption in Apple SafariPriority MEDIUM 41
    • TI-2026-23159 Type confusion in Apple iOS and iPadOSPriority MEDIUM 40
    Show all 41 records →
  • Release ·

    Apple iOS and iPadOS 26.5

    18 records Highest priority Priority LOW 18 LOW

    Other records, highest priority first

    • TI-2026-23152 Improper access control in Apple iOS and iPadOSPriority LOW 39
    • TI-2026-23144 Improper access control in Apple iOS and iPadOSPriority LOW 39
    • TI-2026-23143 Apple iOS and iPadOS: An app may be able to access sensitive user dataPriority LOW 39
    Show all 18 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-28991
  2. 2026-10-03 Alias added: GHSA-778p-qw96-fmjp
  3. 2026-10-26 Fix available: Apple/[email protected] · CNA
  4. 2026-10-26 1 new reference · CNA

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