---
id: CVE-2026-28819
title: An out-of-bounds write issue was addressed with improved bounds checking
summary: >-
  An out-of-bounds write issue was addressed with improved bounds checking. This
  issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, macOS Sequoia 15.7.7, macOS
  Sonoma 14.8.7, macOS Tahoe 26.5. An app may be able to execute arbitrary code
  with…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-787
vendor: apple
product: ipados
affected:
  - ipados < 18.7.9
  - iphone_os < 18.7.9
  - 'macos >= 14.0, < 14.8.7'
  - 'macos >= 15.0, < 15.7.7'
  - 'macos >= 26.0, < 26.5'
patched:
  - ipados 18.7.9
  - iphone_os 18.7.9
  - macos 26.5
published: '2026-05-11'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T23:17:41.590'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-28819'
references:
  - url: 'https://support.apple.com/en-us/127111'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/127115'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/127116'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/127117'
    label: product-security@apple.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-05-13T03:57:43.939236Z'
epss: 0.06498
epssPercentile: 0.93789
ingestedAt: '2026-11-05T06:38:03.613Z'
---

## Overview

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.5. An app may be able to execute arbitrary code with kernel privileges.

## Affected

- `ipados < 18.7.9`
- `iphone_os < 18.7.9`
- `macos >= 14.0, < 14.8.7`
- `macos >= 15.0, < 15.7.7`
- `macos >= 26.0, < 26.5`

## Remediation

Upgrade past the affected range:

- `ipados 18.7.9`
- `iphone_os 18.7.9`
- `macos 26.5`