Published Apr 23, 2026Sources checked Nov 12, 2026
8.3HIGHCVSS out of 10
What this means
Review the available evidence
CVE-2026-6921 and is rated High severity with a CVSS score of 8.3. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.
What to do next
Remediation and response
Microsoft Security Response Center guidance
Vendor revision: Apr 24, 2026
Release Notes
Vendor-listed releases
147.0.3912.86
CISA KEVNot listedBased on the latest collected catalog
EPSS0.2%Estimated 30-day exploitation probability
Ransomware useNot markedCISA KEV ransomware field
Threat actors0Source-linked actor relationships
Overview
What is CVE-2026-6921?
Race in GPU in Google Chrome on Windows prior to 147.0.7727.117 allowed a remote attacker to potentially perform a sandbox escape via a crafted video file. (Chromium security severity: Medium)