---
id: CVE-2026-84578
title: A logic issue was addressed with improved checks
summary: >-
  A logic issue was addressed with improved checks. This issue is fixed in macOS
  Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to
  break out of its sandbox.
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-693
vendor: apple
product: macos
affected:
  - 'macos >= 15.0, < 15.8'
  - 'macos >= 26.0, < 26.7'
patched:
  - macos 26.7
published: '2026-09-14'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T04:17:56.980'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-84578'
references:
  - url: 'https://support.apple.com/en-us/149035'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/149042'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/149043'
    label: product-security@apple.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-17T15:27:31.170340Z'
epss: 0.00173
epssPercentile: 0.05897
ingestedAt: '2026-09-14T21:15:17.474Z'
---

## Overview

A logic issue was addressed with improved checks. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to break out of its sandbox.

## Affected

- `macos >= 15.0, < 15.8`
- `macos >= 26.0, < 26.7`

## Remediation

Upgrade past the affected range:

- `macos 26.7`