---
id: "CVE-2026-112505"
kind: "vulnerability"
aliases: ["CVE-2026-112505"]
title: "Apple macOS Screen Sharing: out-of-bounds write lets a peer corrupt memory"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["infrastructure", "macos", "screen-sharing", "self-hosted"]
not_affected_if: ["patched-macos", "screen-sharing-off"]
published_at: "2026-10-26T21:17:41+00:00"
first_seen_at: "2026-10-26T21:20:26+00:00"
updated_at: "2026-10-26T21:29:44+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-112505", "first_seen_at": "2026-10-26T21:20:26+00:00"}]
---

# Apple macOS Screen Sharing: out-of-bounds write lets a peer corrupt memory

A bounds-checking flaw in macOS Screen Sharing lets a malicious peer write past a buffer and corrupt process memory. Apple fixed it in macOS Golden Gate 27.2, Sequoia 15.8.2 and Tahoe 26.7.2.

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

## How to check

- Run `sw_vers -productVersion` and compare against `27.2`, `15.8.2` and `26.7.2` for the matching macOS line
- Check whether Screen Sharing is enabled in System Settings under General, Sharing
- Confirm the fixed build with the sources, since the NVD entry gives no extra detail

## Fix

- Update macOS to `27.2` (Golden Gate), `15.8.2` (Sequoia) or `26.7.2` (Tahoe) via Software Update
- Turn off Screen Sharing on machines that do not need it until patched

## Timeline

- 2026-10-26T21:20:26+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-112505

## From the sources

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 malicious Screen Sharing peer may be able to corrupt process memory.

---

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