What is CVE-2026-84555?

CVE-2026-84555 is a medium-severity vulnerability in Apple macOS, classified under Improper Access Control. CVSS score: 5.5/10. Published 2026-09-14.

How severe is CVE-2026-84555?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Apple macOS

CVE-2026-84555

An authorization issue was addressed with improved access control. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8. An app may be able to access sensitive user data.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

Affected products

Apple Macos

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

product-security@apple.com
product-security@apple.com

Frequently asked questions

What is CVE-2026-84555?: CVE-2026-84555 is a medium-severity vulnerability in Apple macOS, classified under Improper Access Control. CVSS score: 5.5/10. Published 2026-09-14.
How severe is CVE-2026-84555?: Medium severity. CVSS v3 base score is 5.5 out of 10.