What is CVE-2026-11666?

CVE-2026-11666 is a medium-severity vulnerability in Apple Macos, classified under Improper Input Validation. CVSS score: 5.4/10. Published 2026-06-09.

How severe is CVE-2026-11666?

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

Improper input validation in Apple Macos

CVE-2026-11666

Insufficient validation of untrusted input in Input in Google Chrome prior to 149.0.7827.103 allowed a remote attacker to perform UI spoofing via a crafted HTML page. (Chromium security severity: High)

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

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:N/A:L.

Affected products

Apple Macos
Google Chrome
Linux Linux_kernel
Microsoft Windows

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)

Frequently asked questions

What is CVE-2026-11666?: CVE-2026-11666 is a medium-severity vulnerability in Apple Macos, classified under Improper Input Validation. CVSS score: 5.4/10. Published 2026-06-09.
How severe is CVE-2026-11666?: Medium severity. CVSS v3 base score is 5.4 out of 10.