What is CVE-2026-20603?

CVE-2026-20603 is a medium-severity vulnerability in Apple Macos, classified under Improper Access Control. CVSS score: 4.4/10. Published 2026-02-11.

How severe is CVE-2026-20603?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Vulnerability in Apple Macos

CVE-2026-20603

This issue was addressed with improved redaction of sensitive information. This issue is fixed in macOS Tahoe 26.3. An app with root privileges may be able to access private information.

EPSS: 0.001 (3.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.

Affected products

Apple Macos — versions 0

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

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

Frequently asked questions

What is CVE-2026-20603?: CVE-2026-20603 is a medium-severity vulnerability in Apple Macos, classified under Improper Access Control. CVSS score: 4.4/10. Published 2026-02-11.
How severe is CVE-2026-20603?: Medium severity. CVSS v3 base score is 4.4 out of 10.