What is CVE-2026-28840?

CVE-2026-28840 is a high-severity vulnerability in Apple Macos, classified under Improper Privilege Management. CVSS score: 7.8/10. Published 2026-05-11.

How severe is CVE-2026-28840?

High severity. CVSS v3 base score is 7.8 out of 10.

Privilege escalation in Apple Macos

CVE-2026-28840

A permissions issue was addressed with additional restrictions. This issue is fixed in macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.4. An app may be able to gain root privileges.

Vulnerability class: Privilege Escalation

EPSS: 0.000 (1.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Apple Macos — versions 0

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

References

product-security@apple.com (Release Notes, Vendor Advisory)
product-security@apple.com (Release Notes, Vendor Advisory)
product-security@apple.com (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2026-28840?: CVE-2026-28840 is a high-severity vulnerability in Apple Macos, classified under Improper Privilege Management. CVSS score: 7.8/10. Published 2026-05-11.
How severe is CVE-2026-28840?: High severity. CVSS v3 base score is 7.8 out of 10.