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CVE-2026-11021 Google CVE debrief

CVE-2026-11021 is a critical vulnerability in Google Chrome on Windows, allowing a remote attacker to potentially perform a sandbox escape via a crafted HTML page. The vulnerability has a CVSS score of 9.6 and is classified as CRITICAL.

Vendor
Google
Product
Chrome
CVSS
CRITICAL 9.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-04
Original CVE updated
2026-06-08
Advisory published
2026-06-04
Advisory updated
2026-06-08

Who should care

Users of Google Chrome on Windows, particularly those who may be targeted by remote attackers, should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability is caused by insufficient validation of untrusted input in the GPU of Google Chrome on Windows. This allows a remote attacker who has compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page.

Defensive priority

High

Recommended defensive actions

  • Update Google Chrome to version 149.0.7827.53 or later.
  • Use a web browser other than Google Chrome until a patch is applied.
  • Be cautious when opening HTML pages from untrusted sources.

Evidence notes

The vulnerability was reported by an anonymous researcher and is classified as Medium severity by Chromium.

Official resources

CVE-2026-11021 was published on 2026-06-04T23:17:06.050Z and modified on 2026-06-08T18:16:23.970Z.