CVE-2021-30563: Google Chromium V8 Type Confusion Vulnerability

High severity, CVSS 8.8. Actively exploited: in CISA KEV since 2021-11-03. EPSS: 9% chance of exploitation in the next 30 days.

Type Confusion in V8 in Google Chrome prior to 91.0.4472.164 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Affected products

• Google Chrome: before 91.0.4472.164 (fixed in 91.0.4472.164)

Published 2021-08-03. Last modified 2026-06-17.