---
title: "Apple macOS — CVE-2026-65400"
description: "An authentication bypass flaw affects Apple macOS. Apply the vendor’s patch. It is being actively exploited: patch now."
canonical: https://inyourgeek.com/en/failles-de-securite/2026-08-18-cve-2026-65400
type: faille-de-securite
author: "Sébastien Soulier"
publisher: "InYourGeek"
language: en
datePublished: 2026-08-18
dateModified: 2026-08-18
---
# Apple macOS — CVE-2026-65400

An authentication bypass flaw affects Apple macOS. Apply the vendor’s patch. It is being actively exploited: patch now.

## What to do

Check the vendor advisory for the fixed version. This flaw is being actively exploited: patch now.

| Fact | Value |
| --- | --- |
| Ecosystem | Operating system |
| Class | Authentication bypass |
| CVE | CVE-2026-65400 |
| Published on | August 18, 2026 |
| Severity | Critical |

## Sources

- [CISA KEV — CVE-2026-65400](https://www.cisa.gov/known-exploited-vulnerabilities-catalog) — CISA Known Exploited Vulnerabilities
- [NVD — CVE-2026-65400](https://nvd.nist.gov/vuln/detail/CVE-2026-65400) — NVD

---

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