---
id: CVE-2026-20683
title: An authentication issue was addressed with improved state management
summary: >-
  An authentication issue was addressed with improved state management. This
  issue is fixed in iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia
  15.8, macOS Tahoe 26.7, visionOS 27. An app may be able to use the Sign In
  With Apple …
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N'
cwe:
  - CWE-287
vendor: apple
product: ipados
affected:
  - ipados < 27.0
  - iphone_os < 27.0
  - 'macos >= 15.0, < 15.8'
  - 'macos >= 26.0, < 26.7'
  - visionos < 27.0
patched:
  - ipados 27.0
  - iphone_os 27.0
  - macos 26.7
  - visionos 27.0
published: '2026-09-14'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T14:26:22.617'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-20683'
references:
  - url: 'https://support.apple.com/en-us/149034'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/149035'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/149038'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/149042'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/149043'
    label: product-security@apple.com
tags:
  - nvd
  - cve.org
epss: 0.00188
epssPercentile: 0.08672
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-16T19:30:17.076947Z'
ingestedAt: '2026-09-14T21:15:17.523Z'
---

## Overview

An authentication issue was addressed with improved state management. This issue is fixed in iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7, visionOS 27. An app may be able to use the Sign In With Apple authentication flow to access the user's Apple Account.

## Affected

- `ipados < 27.0`
- `iphone_os < 27.0`
- `macos >= 15.0, < 15.8`
- `macos >= 26.0, < 26.7`
- `visionos < 27.0`

## Remediation

Upgrade past the affected range:

- `ipados 27.0`
- `iphone_os 27.0`
- `macos 26.7`
- `visionos 27.0`