What is CVE-2026-91728?

CVE-2026-91728 is a critical-severity vulnerability in Google Chrome, classified under Integer Overflow or Wraparound. CVSS score: 9.6/10. Published 2026-09-15.

How severe is CVE-2026-91728?

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

Integer overflow in Google Chrome

CVE-2026-91728

Integer overflow in V8 in Google Chrome prior to 153.0.8010.47 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)

Vulnerability class: Integer Overflow

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

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

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

Frequently asked questions

What is CVE-2026-91728?: CVE-2026-91728 is a critical-severity vulnerability in Google Chrome, classified under Integer Overflow or Wraparound. CVSS score: 9.6/10. Published 2026-09-15.
How severe is CVE-2026-91728?: Critical severity. CVSS v3 base score is 9.6 out of 10.