What is CVE-2026-64704?

CVE-2026-64704 is a critical-severity vulnerability in Apple Macos, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 9.8/10. Published 2026-07-27.

How severe is CVE-2026-64704?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Apple Macos

CVE-2026-64704

A type confusion 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.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Apple Macos — versions 0

Weakness classification (CWE)

CWE-843 — Access of Resource Using Incompatible Type (Type Confusion)

References

product-security@apple.com (Release Notes, Vendor Advisory)
product-security@apple.com (Release Notes, Vendor Advisory)
product-security@apple.com (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2026-64704?: CVE-2026-64704 is a critical-severity vulnerability in Apple Macos, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 9.8/10. Published 2026-07-27.
How severe is CVE-2026-64704?: Critical severity. CVSS v3 base score is 9.8 out of 10.