CVE-2026-43767 Memory corruption in macOS

Medium 5.0 Published 27 Jul 2026 Updated 28 Jul 2026

An attacker can cause unexpected system termination on macOS via memory handling flaws, requiring a system update.

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

What is CVE-2026-43767?

CVE-2026-43767 is a medium-severity memory corruption vulnerability in Apple Macos, published on 27 Jul 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. An app may be able to cause unexpected system termination.

Weakness: CWE-125, CWE-787, CWE-119

Which versions are affected by CVE-2026-43767?

It affects 1 product.

Products include Apple Macos.

How do I fix CVE-2026-43767?

No fix has been published for CVE-2026-43767 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-43767 being exploited?

There is no known exploitation of CVE-2026-43767 in the wild and no public exploit code.

All Apple Macos vulnerabilities

Sources

Also known as GHSA-m6w9-pc3v-8x5f.