---
id: CVE-2026-43658
title: The issue was addressed with improved memory handling
summary: >-
  The issue was addressed with improved memory handling. This issue is fixed in
  Safari 26.5, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.5 and iPadOS 26.5, macOS
  Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. Processing maliciously
  crafted…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-119
  - CWE-120
vendor: apple
product: ipados
affected:
  - ipados < 26.5
  - iphone_os < 26.5
  - 'macos >= 26.0, < 26.5'
  - tvos < 26.5
  - visionos < 26.5
  - watchos < 26.5
patched:
  - ipados 26.5
  - iphone_os 26.5
  - macos 26.5
  - tvos 26.5
  - visionos 26.5
  - watchos 26.5
published: '2026-05-11'
updated: '2026-08-17'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-43658'
references:
  - url: 'https://support.apple.com/en-us/127110'
    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/127118'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/127119'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/127120'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/127121'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/148287'
    label: product-security@apple.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:25918'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/errata/RHSA-2026:25927'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/errata/RHSA-2026:27728'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/errata/RHSA-2026:27785'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/errata/RHSA-2026:27804'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/errata/RHSA-2026:28114'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/errata/RHSA-2026:28146'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/errata/RHSA-2026:28147'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/errata/RHSA-2026:28148'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/security/cve/CVE-2026-43658'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2483968'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43658.json
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
tags:
  - nvd
epss: 0.00543
epssPercentile: 0.43137
ingestedAt: '2026-08-18T15:19:02.281Z'
---

## Overview

The issue was addressed with improved memory handling. This issue is fixed in Safari 26.5, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. Processing maliciously crafted web content may lead to an unexpected Safari crash.

## Affected

- `ipados < 26.5`
- `iphone_os < 26.5`
- `macos >= 26.0, < 26.5`
- `tvos < 26.5`
- `visionos < 26.5`
- `watchos < 26.5`

## Remediation

Upgrade past the affected range:

- `ipados 26.5`
- `iphone_os 26.5`
- `macos 26.5`
- `tvos 26.5`
- `visionos 26.5`
- `watchos 26.5`