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Vulnerability record · CVE-2026-84505 · published 14 September 2026

CVE-2026-84505: Apple macos out-of-bounds write vulnerability

Apple · Macos

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to gain root privileges.

7.8 CVSS 3.1 High EPSS 0.17% · top 94.0% CWE-787 · Out-of-bounds write
7.8CVSS 3.1 base score
0.17%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References
16 Sep 2026Last modified by NVD

Description

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to gain root privileges.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://support.apple.com/en-us/149035 Release NotesVendor Advisory
https://support.apple.com/en-us/149042 Release NotesVendor Advisory
https://support.apple.com/en-us/149043 Release NotesVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-84505), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.