What is CVE-2026-64694?

CVE-2026-64694 is a critical-severity vulnerability in Apple Macos, classified under Integer Overflow or Wraparound. CVSS score: 9.8/10. Published 2026-07-27.

How severe is CVE-2026-64694?

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

Integer overflow in Apple Macos

CVE-2026-64694

An integer overflow was addressed with improved input validation. 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.

Vulnerability class: Integer Overflow

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-190 — Integer Overflow or Wraparound

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-2026-64694?: CVE-2026-64694 is a critical-severity vulnerability in Apple Macos, classified under Integer Overflow or Wraparound. CVSS score: 9.8/10. Published 2026-07-27.
How severe is CVE-2026-64694?: Critical severity. CVSS v3 base score is 9.8 out of 10.