---
id: CVE-2026-84590
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 macOS Golden Gate 27.2, macOS Sequoia 15.8.2, macOS Tahoe
  26.7.2. A remote attacker may be able to cause unexpected app termination or
  heap …
severity: none
vendor: Apple
product: macOS
affected:
  - macOS < 15.8.2
  - macOS < 26.7.2
  - macOS < 27.2
published: '2026-10-26'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T20:40:54.778Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-84590'
references:
  - url: 'https://support.apple.com/en-us/149521'
  - url: 'https://support.apple.com/en-us/149522'
  - url: 'https://support.apple.com/en-us/149523'
tags:
  - cve.org
epss: 0.0032
epssPercentile: 0.24873
ingestedAt: '2026-10-27T16:11:59.002Z'
---

## Overview

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27.2, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. A remote attacker may be able to cause unexpected app termination or heap corruption.

## Affected

- `macOS < 15.8.2`
- `macOS < 26.7.2`
- `macOS < 27.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.