What is CVE-2026-40599?

CVE-2026-40599 is a high-severity vulnerability in Apple Macos, classified under Incorrect Authorization. CVSS score: 7.1/10. Published 2026-04-21.

How severe is CVE-2026-40599?

High severity. CVSS v3 base score is 7.1 out of 10.

Auth bypass in Apple Macos

CVE-2026-40599

ClearanceKit intercepts file-system access events on macOS and enforces per-process access policies. Prior to 5.0.5, ClearanceKit incorrectly treats a process with an empty Team ID and a non-empty Signing ID as an Apple platform binary. Th…

Vulnerability class: Broken Access Control

EPSS: 0.001 (3.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

Affected products

Apple Macos
Craigjbass Clearancekit — versions < 5.0.5

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-40599?: CVE-2026-40599 is a high-severity vulnerability in Apple Macos, classified under Incorrect Authorization. CVSS score: 7.1/10. Published 2026-04-21.
How severe is CVE-2026-40599?: High severity. CVSS v3 base score is 7.1 out of 10.