CVE-2026-64699 Information disclosure in macOS

Medium 5.5 Published 27 Jul 2026 Updated 28 Jul 2026

An app can disclose kernel memory due to a memory initialization issue in macOS, requiring a system update to fix.

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

What is CVE-2026-64699?

CVE-2026-64699 is a medium-severity 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

A memory initialization 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 disclose kernel memory.

Weakness: CWE-457

Which versions are affected by CVE-2026-64699?

It affects 1 product.

Products include Apple Macos.

How do I fix CVE-2026-64699?

No fix has been published for CVE-2026-64699 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-64699 being exploited?

There is no known exploitation of CVE-2026-64699 in the wild and no public exploit code.

All Apple Macos vulnerabilities

Sources

Also known as GHSA-554h-c6gx-2294.