---
id: CVE-2025-43464
title: A denial-of-service issue was addressed with improved input validation
summary: >-
  A denial-of-service issue was addressed with improved input validation. This
  issue is fixed in macOS Tahoe 26.1. Visiting a website may lead to an app
  denial-of-service.
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-20
vendor: apple
product: macos
affected:
  - macos < 26.1
patched:
  - macos 26.1
published: '2025-12-12'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T20:10:01.970'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-43464'
references:
  - url: 'https://support.apple.com/en-us/125634'
    label: product-security@apple.com
tags:
  - nvd
epss: 0.00384
epssPercentile: 0.30224
ingestedAt: '2026-10-07T20:46:46.914Z'
---

## Overview

A denial-of-service issue was addressed with improved input validation. This issue is fixed in macOS Tahoe 26.1. Visiting a website may lead to an app denial-of-service.

## Affected

- `macos < 26.1`

## Remediation

Upgrade past the affected range:

- `macos 26.1`