What is CVE-2026-19166?

CVE-2026-19166 is a critical-severity vulnerability in Google Chrome, classified under Use After Free. CVSS score: 9.6/10. Published 2026-08-06.

How severe is CVE-2026-19166?

Critical severity. CVSS v3 base score is 9.6 out of 10.

Use After Free in Google Chrome

CVE-2026-19166

Use after free in Web Authentication in Google Chrome prior to 151.0.7922.109 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)

Vulnerability class: Use-After-Free

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

Affected products

Google Chrome — versions 151.0.7922.109

Weakness classification (CWE)

CWE-416 — Use After Free

References

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

Frequently asked questions

What is CVE-2026-19166?: CVE-2026-19166 is a critical-severity vulnerability in Google Chrome, classified under Use After Free. CVSS score: 9.6/10. Published 2026-08-06.
How severe is CVE-2026-19166?: Critical severity. CVSS v3 base score is 9.6 out of 10.