---
id: CVE-2026-65390
title: An integer overflow was addressed with improved input validation
summary: >-
  An integer overflow was addressed with improved input validation. 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 le…
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: '2026-09-16T14:12:52.793'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-65390'
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: '2026-09-15T17:44:35.460809Z'
ingestedAt: '2026-09-14T21:15:17.549Z'
---

## Overview

An integer overflow was addressed with improved input validation. 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`