CVE-2026-11021

chromium-browser: Insufficient validation of untrusted input in GPU

Published Jun 4, 2026 CVSS 3.1 · 9.6 Critical EPSS < 1% KEV · Not listed
Description
Insufficient validation of untrusted input in GPU in Google Chrome on Windows prior to 149.0.7827.53 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Medium)

Analysis

AI-generated

Technical impact

The flaw resides in Google Chrome’s GPU component on Windows, where untrusted input is insufficiently validated. After compromising the renderer process, an attacker can craft a malicious HTML page that triggers the vulnerability, potentially escaping the browser sandbox. This boundary violation (CWE‑20) can elevate privileges or allow full system compromise if the escape succeeds. The CVE notes a Medium severity from Chromium, yet the CVSS score of 9.6 indicates a high potential impact.

Affected Systems

Chrome users on Windows running a version older than 149.0.7827.53 are affected because the fix was backported in that update. Any installation that allows the renderer to load untrusted web content is at risk. All Windows desktop versions with Chrome remain in scope until the upgrade is applied.

Risk and Exploitability

With a CVSS score of 9.6 and an EPSS score below 1%, the vulnerability is high severity but its exploitation likelihood is low, as it requires prior renderer compromise. It is not listed in the CISA KEV catalog, indicating no known active exploitation. The attack vector is inferred from the description: a remote malicious HTML page that feeds untrusted data into the GPU path after the renderer has been compromised.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Upgrade Google Chrome to 149.0.7827.53 or later to apply the vendor fix.
  • If an update cannot be applied immediately, launch Chrome with the "--disable-gpu" flag or disable Hardware Acceleration in settings to bypass the GPU rendering path that contains the flaw.
  • Restrict renderer processes by enabling Chrome’s "Renderer process sandbox" settings and ensuring only trusted sites can trigger GPU rendering, thereby reducing the attack surface.

Generated by OpenCVE AI on June 8, 2026 at 16:40 UTC.

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-6325-1 chromium security update
History
Type Values Removed Values Added
First Time appeared Microsoft
Microsoft windows
CPEs cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft windows
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.0, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

cvssV3_1

{'score': 9.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H'}

Type Values Removed Values Added
Title GPU Sandbox Escape via Untrusted Input in Chrome chromium-browser: Insufficient validation of untrusted input in GPU
Weaknesses CWE-179
References
Metrics threat_severity

None

cvssV3_1

{'score': 9.0, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H'}

threat_severity

Moderate

Type Values Removed Values Added
First Time appeared Google
Google chrome
Vendors & Products Google
Google chrome
Type Values Removed Values Added
Title GPU Sandbox Escape via Untrusted Input in Chrome
Type Values Removed Values Added
Description Insufficient validation of untrusted input in GPU in Google Chrome on Windows prior to 149.0.7827.53 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Medium)
Weaknesses CWE-20
References
Weaknesses
  • CWE-179

    Incorrect Behavior Order: Early Validation

  • CWE-20

    Improper Input Validation

Sources

Status
PUBLISHED
Assigner
Chrome
Published
Updated
Jun 8, 2026, 3:05 PM
Reserved
Jun 4, 2026, 5:06 PM
Status
Analyzed
Published
Jun 4, 2026, 11:17 PM
Modified
Jul 22, 2026, 8:10 PM
Severity
Moderate
Public date
Jun 2, 2026, 12:00 AM