---
id: CVE-2026-43688
title: A memory corruption issue was addressed with improved input validation
summary: >-
  A memory corruption issue was addressed with improved input validation. This
  issue is fixed in iOS 27 and iPadOS 27, macOS Golden Gate 27. Processing a
  maliciously crafted file may lead to unexpected app termination.
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-1021
vendor: apple
product: ipados
affected:
  - ipados < 27.0
  - iphone_os < 27.0
  - macos < 27.0
patched:
  - ipados 27.0
  - iphone_os 27.0
  - macos 27.0
published: '2026-09-14'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T18:41:43.723'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-43688'
references:
  - url: 'https://support.apple.com/en-us/149034'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/149035'
    label: product-security@apple.com
tags:
  - nvd
  - cve.org
epss: 0.00163
epssPercentile: 0.04869
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-16T13:55:33.854511Z'
ingestedAt: '2026-09-14T21:15:17.543Z'
---

## Overview

A memory corruption issue was addressed with improved input validation. This issue is fixed in iOS 27 and iPadOS 27, macOS Golden Gate 27. Processing a maliciously crafted file may lead to unexpected app termination.

## Affected

- `ipados < 27.0`
- `iphone_os < 27.0`
- `macos < 27.0`

## Remediation

Upgrade past the affected range:

- `ipados 27.0`
- `iphone_os 27.0`
- `macos 27.0`