CVE-2026-84559 Missing authorization in macOS

Medium 5.5 Published 14 Sep 2026 Updated 26 Oct 2026

A malicious application can access restricted files due to insufficient validation, requiring users to update macOS.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-84559?

CVE-2026-84559 is a medium-severity missing authorization vulnerability in Apple Macos, published on 14 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A permissions issue was addressed with improved validation. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. A malicious application may be able to access restricted files.

Weakness: CWE-693

Which versions are affected by CVE-2026-84559?

It affects 1 product.

Products include Apple Macos.

How do I fix CVE-2026-84559?

No fix has been published for CVE-2026-84559 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-84559 being exploited?

There is no known exploitation of CVE-2026-84559 in the wild and no public exploit code.

All Apple Macos vulnerabilities

Sources

Also known as GHSA-f4vr-w4mm-6rgv.