What is CVE-2026-91734?

CVE-2026-91734 is a high-severity vulnerability in Google Chrome, classified under Incorrect Authorization. CVSS score: 7.4/10. Published 2026-09-15.

How severe is CVE-2026-91734?

High severity. CVSS v3 base score is 7.4 out of 10.

Auth bypass in Google Chrome

CVE-2026-91734

Incorrect authorization in Core in Google Chrome on on Windows prior to 153.0.8010.47 allowed a local attacker to execute arbitrary code outside the sandbox via a local program. (Chromium security severity: High)

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Google Chrome

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

chrome-cve-admin@google.com
chrome-cve-admin@google.com

Frequently asked questions

What is CVE-2026-91734?: CVE-2026-91734 is a high-severity vulnerability in Google Chrome, classified under Incorrect Authorization. CVSS score: 7.4/10. Published 2026-09-15.
How severe is CVE-2026-91734?: High severity. CVSS v3 base score is 7.4 out of 10.