---
id: "CVE-2026-86874"
kind: "vulnerability"
aliases: ["CVE-2026-86874"]
title: "Xcode: crafted binary parsing out-of-bounds read crashes the tool"
severity: "low"
cvss: 3.3
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["ios", "macos", "runtime", "xcode"]
not_affected_if: ["trusted-binaries-only"]
published_at: "2026-10-20T01:17:25+00:00"
first_seen_at: "2026-10-23T21:57:19+00:00"
updated_at: "2026-10-25T04:46:08+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-86874", "first_seen_at": "2026-10-23T21:57:19+00:00"}]
---

# Xcode: crafted binary parsing out-of-bounds read crashes the tool

Xcode's parser reads past the end of a buffer when it processes a maliciously crafted binary. The result is that the tool terminates unexpectedly, and the sources do not describe code execution.

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

## How to check

- Run `xcodebuild -version` and compare the Xcode version against the fixed release
- unknown

## Fix

- Update Xcode to `27` or later
- unknown

## Timeline

- 2026-10-23T21:57:19+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-86874

## From the sources

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.

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