What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2021-11-03
• EPSS: 9.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-08-03 · updated 2026-06-17
• Weakness: CWE-843

Description

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

How to fix

Upgrade to a fixed version: Google Chrome 91.0.4472.164. Check the vendor advisory for mitigations.

References

• https://chromereleases.googleblog.com/2021/07/stable-channel-update-for-desktop.html
• https://crbug.com/1228407
• https://chromereleases.googleblog.com/2021/07/stable-channel-update-for-desktop.html
• https://crbug.com/1228407
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30563

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