---
id: CVE-2026-86874
title: An out-of-bounds read was addressed with improved input validation
summary: >-
  An out-of-bounds read was addressed with improved input validation. This issue
  is fixed in Xcode 27. Parsing a maliciously crafted binary may lead to
  unexpected tool termination.
severity: low
cvss: 3.3
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L'
cvssSource: adp
vendor: Apple
product: Xcode
affected:
  - Xcode < 27
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-20T14:30:19.888216Z'
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T14:30:23.511Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-86874'
references:
  - url: 'https://support.apple.com/en-us/149040'
tags:
  - cve.org
epss: 0.00134
epssPercentile: 0.02853
ingestedAt: '2026-10-20T01:49:42.596Z'
---

## Overview

An out-of-bounds read was addressed with improved input validation. This issue is fixed in Xcode 27. Parsing a maliciously crafted binary may lead to unexpected tool termination.

## Affected

- `Xcode < 27`

## Remediation

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