Live › vulnerability › CVE-2021-37973
Go to dashboardA use-after-free bug in Chromium's Portals feature lets a remote attacker who already controls the renderer process escape the browser sandbox via a crafted HTML page. CISA lists it as actively exploited in the wild.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 3h before NVD. All times on this page are UTC.
Apply updates per vendor instructions.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Google Chromium Portals | vendor | – | – |
Open chrome://version or edge://version and compare the version to the fixed release in the vendor advisory.
Update Google Chrome and Microsoft Edge (or other Chromium-based browsers) to the latest stable release, per vendor instructions.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Google Chromium Portals 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 affects web browsers that utilize Chromium, including Google Chrome and Microsoft Edge.
CISA required action: Apply updates per vendor instructions.
This page as .md · .json · in your agent: get_signal("CVE-2021-37973")
CISA KEV catalog, Creative Commons 0 · EPSS scores by FIRST, used with attribution · NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.