AppleCVE-2026-84577

Apple macOS: buffer overflow

CVE-2026-84577 · Published Sep 14, 2026 · updated Sep 16, 2026

High8.2

Fix: upgrade to 26.7 or later (2 fixed versions below)

An access issue was addressed with additional sandbox restrictions. This issue is fixed in macOS Golden Gate 27, macOS Tahoe 26.7. An app may be able to bypass sandbox restrictions.

Affected versions

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

Details and references

CVSS 3.1: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Severity from: CISA (its enrichment of the CVE record)
Weakness: CWE-120

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Apple iOS and iPadOS: improper access controlCVE-2026-86905fixed in 27 +2 Medium 4.4Sep 14

Apple macOS: protection mechanism failureCVE-2026-86909fixed in 27 Medium 5.5Sep 14

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