---
id: CVE-2026-65391
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 Safari 26.6.1, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe
  26.6.2, tvOS 27, visionOS 27, watchOS 27. Processing maliciously crafted web
  conten…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-190
vendor: apple
product: safari
affected:
  - safari < 26.6.1
  - ipados < 26.6.1
  - iphone_os < 26.6.1
  - macos < 26.6.2
  - tvos < 27.0
  - visionos < 27.0
  - watchos < 27.0
patched:
  - safari 26.6.1
  - ipados 26.6.1
  - iphone_os 26.6.1
  - macos 26.6.2
  - tvos 27.0
  - visionos 27.0
  - watchos 27.0
published: '2026-09-14'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T14:12:25.677'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-65391'
references:
  - url: 'https://support.apple.com/en-us/148281'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/148282'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/148286'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/149036'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/149037'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/149038'
    label: product-security@apple.com
tags:
  - nvd
  - cve.org
epss: 0.00413
epssPercentile: 0.32744
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-15T17:47:28.222517Z'
ingestedAt: '2026-09-14T21:15:17.547Z'
---

## Overview

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in Safari 26.6.1, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2, tvOS 27, visionOS 27, watchOS 27. Processing maliciously crafted web content may lead to memory corruption.

## Affected

- `safari < 26.6.1`
- `ipados < 26.6.1`
- `iphone_os < 26.6.1`
- `macos < 26.6.2`
- `tvos < 27.0`
- `visionos < 27.0`
- `watchos < 27.0`

## Remediation

Upgrade past the affected range:

- `safari 26.6.1`
- `ipados 26.6.1`
- `iphone_os 26.6.1`
- `macos 26.6.2`
- `tvos 27.0`
- `visionos 27.0`
- `watchos 27.0`