CVE-2021-30633: Google Chromium Indexed DB API Use-After-Free Vulnerability

Critical severity, CVSS 9.6. Actively exploited: in CISA KEV since 2021-11-03. EPSS: 33.2% chance of exploitation in the next 30 days.

Use after free in Indexed DB API in Google Chrome prior to 93.0.4577.82 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page.

Affected products

• Fedoraproject Fedora: version 33 only; version 35 only
• Google Chrome: before 93.0.4577.82 (fixed in 93.0.4577.82)

Published 2021-10-08. Last modified 2026-06-17.