CVE-2021-30633

CRITICAL9.6

CISA KEV

Published 2021-10-08 · Updated 2026-06-17 · Source chrome-cve-admin@google.com

Summary

CVE-2021-30633 is a critical-severity (CVSS 9.6) vulnerability in Google Chromium Indexed DB API. CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by November 17, 2021. CISA does not currently list it as used in ransomware campaigns. Google has 76 vulnerabilities in the KEV catalog, 0 of them linked to ransomware.

All 76 known-exploited Google vulnerabilities →

Description

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.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

CWE-416CWE-416

CISA Known-Exploited Vulnerability

Product: Google — Chromium Indexed DB API

Name: Google Chromium Indexed DB API Use-After-Free Vulnerability

Date added: 2021-11-03 · Due: 2021-11-17

Required action: Apply updates per vendor instructions.

References

View on NVD

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