---
id: CVE-2026-43783
title: A race condition was addressed with improved locking
summary: >-
  A race condition was addressed with improved locking. This issue is fixed in
  macOS Tahoe 26.6. A malicious app may be able to gain root privileges.
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-362
vendor: apple
product: macos
affected:
  - macos < 26.6
patched:
  - macos 26.6
published: '2026-09-14'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T19:24:16.433'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-43783'
references:
  - url: 'https://support.apple.com/en-us/128067'
    label: product-security@apple.com
tags:
  - nvd
  - exploit-available
  - cve.org
epss: 0.00153
epssPercentile: 0.04823
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/andrd3v/CVE-2026-43783'
  checkedAt: '2026-09-21T15:28:57.333Z'
exploitAvailable: true
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-14T22:28:25.392511Z'
ingestedAt: '2026-09-14T21:15:17.486Z'
---

## Overview

A race condition was addressed with improved locking. This issue is fixed in macOS Tahoe 26.6. A malicious app may be able to gain root privileges.

## Affected

- `macos < 26.6`

## Remediation

Upgrade past the affected range:

- `macos 26.6`