Vulnerability · Published Jul 27, 2026 · Assigned by apple

CVE-2026-64727

Critical 9.8

In plain English

A critical-severity type confusion in macOS from Apple. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)0.5%top 57.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

A type confusion issue was addressed with improved memory handling. This issue is fixed in macOS Tahoe 26.6, tvOS 26.6. An app may be able to cause unexpected system termination.

Affected products (as reported)

Vendor	Product	Versions
Apple	macOS	0 – before 26.6
Apple	tvOS	0 – before 26.6

Weakness: CWE-843 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

https://support.apple.com/en-us/128067
https://support.apple.com/en-us/128069