# CVE-2021-30554: Google Chromium WebGL Use-After-Free Vulnerability

Source: https://junglewise.ai/threats/cve-2021-30554-google-chromium-webgl-use-after-free-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-11-03. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2021-30554 · Severity: critical · CVSS 8.8 · Exploited in the wild · Published 2021-11-03

A use-after-free vulnerability exists in the WebGL component of Google Chromium. A remote attacker can exploit this flaw via a specially crafted HTML page to cause heap corruption, potentially leading to arbitrary code execution.

Vendors: [Google](https://junglewise.ai/threats/vendors/google).

## Quick answers

**Is CVE-2021-30554 exploited in the wild?** Yes. CVE-2021-30554 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.

**How severe is CVE-2021-30554?** Critical severity, with a CVSS score of 8.8, published 3 November 2021.

**Which products and versions are affected?** Google Chrome prior to 91.0.4472.114; Microsoft Edge; Opera Software Opera.

**Is there a fix for CVE-2021-30554?** A patch was published on 2021-06-17: Stable channel update for desktop released. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2021-30554 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2021-30554?** Check whether you run Google Chromium Webgl. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Google Chrome prior to 91.0.4472.114
- Microsoft Edge
- Opera Software Opera

## Timeline

- 2021-06-17: patched: Stable channel update for desktop released.
- 2021-11-03: disclosed: Vulnerability published and added to CISA KEV catalog.
- 2021-11-03: kev added
- 2021-11-03: exploited: Reported as exploited in the wild.