ACTIVELY EXPLOITED

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

Facts
VendorGoogle
ProductChromium WebGL
Actively exploitedYes
Added to CISA KEV3 Nov 2021
CISA federal deadline17 Nov 2021
Weakness (CWE)CWE-416

Required action (CISA's text)

Apply updates per vendor instructions.

Description (NVD)

Google Chromium WebGL contains a use-after-free vulnerability that allows a remote attacker to potentially exploit heap corruption 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.

SOURCES

Other Google flaws

Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.