---
id: "CVE-2026-86929"
kind: "vulnerability"
aliases: ["CVE-2026-86929"]
title: "Apple macOS: out-of-bounds write lets a crafted file run code"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["apple-devices", "infrastructure", "macos"]
not_affected_if: ["unknown"]
published_at: "2026-10-26T21:20:30+00:00"
first_seen_at: "2026-10-26T21:55:22+00:00"
updated_at: "2026-10-26T21:56:56+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-86929", "first_seen_at": "2026-10-26T21:55:22+00:00"}]
---

# Apple macOS: out-of-bounds write lets a crafted file run code

An out-of-bounds write in an unnamed macOS component can be triggered by processing a maliciously crafted file. Apple says this may lead to arbitrary code execution.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- unknown

## Fix

- Update macOS to `27` (Golden Gate), `15.8.2` (Sequoia), or `26.7.2` (Tahoe), per the Apple advisory.

## Timeline

- 2026-10-26T21:55:22+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-86929

## From the sources

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. Processing a maliciously crafted file may lead to arbitrary code execution.

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