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CVE-2021-30633: Google Chromium Indexed DB API Use-After-Free Vulnerability
Google Chromium Indexed DB API · in CISA KEV since 2021-11-03
2021-11-03added to KEV
2021-11-17federal remediation due date
33.18%EPSS exploit probability (30 days) 98.3th percentile
9.6 CRITICALCVSS 3.1
Unknownknown ransomware use
26days from NVD publication to KEV
What it is
Google Chromium Indexed DB API contains a use-after-free vulnerability that allows a remote attacker, who has compromised the renderer process, to potentially perform a sandbox escape via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.
Required action (CISA)
Apply updates per vendor instructions.
| CWE | CWE-416 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
| NVD published | 2021-10-08 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2021-30633.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.