What is CVE-2026-0903?

CVE-2026-0903 is a medium-severity vulnerability in Apple macOS, classified under Improper Input Validation. CVSS score: 5.4/10. Published 2026-01-20.

How severe is CVE-2026-0903?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Improper input validation in Apple macOS

CVE-2026-0903

Inappropriate implementation in Downloads in Google Chrome on Windows prior to 144.0.7559.59 allowed a remote attacker to bypass dangerous file type protections via a malicious file. (Chromium security severity: Medium)

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.002 (7.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

Affected products

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

chrome-cve-admin@google.com (Release Notes, Vendor Advisory)
chrome-cve-admin@google.com (Permissions Required, Issue Tracking)

Frequently asked questions

What is CVE-2026-0903?: CVE-2026-0903 is a medium-severity vulnerability in Apple macOS, classified under Improper Input Validation. CVSS score: 5.4/10. Published 2026-01-20.
How severe is CVE-2026-0903?: Medium severity. CVSS v3 base score is 5.4 out of 10.