AppleCVE-2026-84563

Apple macOS: type confusion

CVE-2026-84563 · Published Sep 14, 2026 · updated Sep 16, 2026

High7.5

Fix: upgrade to 15.8 or later (3 fixed versions below)

A logic issue was addressed with improved checks. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to cause unexpected system termination.

Affected versions

Package	Affected	Fixed in
macOS Product	< 15.8	15.8
	< 26.7	26.7
	< 27	27

Details and references

CVSS 3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Severity from: CISA (its enrichment of the CVE record)
Weakness: CWE-843

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