CVE-2021-30551: Google Chromium V8 Type Confusion Vulnerability

High severity, CVSS 8.8. Actively exploited: in CISA KEV since 2021-11-03. EPSS: 64.7% chance of exploitation in the next 30 days.

Type confusion in V8 in Google Chrome prior to 91.0.4472.101 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Affected products

• Fedoraproject Fedora: version 33 only; version 34 only
• Google Chrome: before 91.0.4472.101 (fixed in 91.0.4472.101)

Published 2021-06-15. Last modified 2026-06-17.