What is CVE-2026-87621?

CVE-2026-87621 is a critical-severity vulnerability in Google Chrome, classified under Out-of-bounds Write. CVSS score: 9.6/10. Published 2026-09-09.

How severe is CVE-2026-87621?

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

Buffer overflow in Google Chrome

CVE-2026-87621

Out of bounds write in ANGLE in Google Chrome on on Windows prior to 153.0.8010.36 allowed a remote attacker to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)

Vulnerability class: Buffer 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-787 — Out-of-bounds Write

References

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

Frequently asked questions

What is CVE-2026-87621?: CVE-2026-87621 is a critical-severity vulnerability in Google Chrome, classified under Out-of-bounds Write. CVSS score: 9.6/10. Published 2026-09-09.
How severe is CVE-2026-87621?: Critical severity. CVSS v3 base score is 9.6 out of 10.