---
id: "CVE-2026-86918"
kind: "vulnerability"
aliases: ["CVE-2026-86918"]
title: "Apple OS: crafted image crashes apps through an out-of-bounds write"
severity: "medium"
cvss: 4.3
epss: null
exploited: false
status: "open"
category: "vendor"
products: []
ecosystems: []
tags: ["apple", "ios", "ipados", "macos", "tvos", "vendor", "visionos", "watchos"]
not_affected_if: ["already-patched-os"]
published_at: "2026-10-20T01:17:27+00:00"
first_seen_at: "2026-10-23T21:57:19+00:00"
updated_at: "2026-10-25T04:39:28+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-86918", "first_seen_at": "2026-10-23T21:57:19+00:00"}]
---

# Apple OS: crafted image crashes apps through an out-of-bounds write

An out-of-bounds write in Apple's image processing can be triggered by a maliciously crafted image, causing the app handling it to terminate unexpectedly. The sources describe a crash and do not claim code execution.

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

## How to check

- Check the device OS version in Settings > General > About; the sources do not list affected versions beyond the fixed releases.

## Fix

- Update to iOS 27, iPadOS 27, macOS Golden Gate 27, tvOS 27, visionOS 27 or watchOS 27, the releases that address the issue.

## Timeline

- 2026-10-23T21:57:19+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-86918

## From the sources

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 27 and iPadOS 27, macOS Golden Gate 27, tvOS 27, visionOS 27, watchOS 27. Processing a maliciously crafted image may lead to unexpected app termination.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_