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PatchSiren cyber security CVE debrief

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
2026-07-22
Advisory published
2026-06-04
Advisory updated
2026-07-22

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.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-11021 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-11021

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-11021 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-11021

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.