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ChromeWeb browser · Google

CVE-2026-11056

CRITICAL · 9.6 CVSS v3.1 Published 2026-06-04
Fix available
A fix is available. Upgrade to 149.0.7827.53 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Insufficient validation of untrusted input in SiteIsolation 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)

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

This is a sandbox escape vulnerability in Google Chrome's SiteIsolation feature on Windows. A remote attacker who has first compromised the renderer process can exploit insufficient validation of untrusted input to escape the Chrome sandbox via a crafted HTML page. The vulnerability affects Chrome versions prior to 149.0.7827.53.

MitigationUpdate Google Chrome for Windows to version 149.0.7827.53 or later to patch the SiteIsolation validation flaw. Organizations should deploy the update through their endpoint management systems and verify compliance.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
ChromeWeb browser
Affected:< 149.0.7827.53

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Verify Chrome is installed on Windows
    Check if Google Chrome exists in the system. Common paths: C:\Program Files\Google\Chrome\Application\chrome.exe or C:\Program Files (x86)\Google\Chrome\Application\chrome.exe. Alternatively, run 'Get-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\chrome.exe" -ErrorAction SilentlyContinue' in PowerShell.
    Affected if Chrome is not installed on the system.
  2. Retrieve the installed Chrome version
    Open Chrome and navigate to chrome://version, or run 'chrome.exe --version' from Command Prompt, or check the version property of chrome.exe in File Explorer.
    Affected if Unable to retrieve a Chrome version number.
  3. Compare against vulnerable version range
    Compare the installed version to the affected range: versions prior to 149.0.7827.53 on Windows are vulnerable. The full version string typically appears as something like 149.0.7827.53 or lower.
    Affected if The installed version is less than 149.0.7827.53 (for example, 148.0.5352.71).
  4. Confirm the operating system is Windows
    This vulnerability specifically affects Windows. Run 'winver' or check system properties to confirm the OS. Chrome on other platforms (macOS, Linux) are not affected by this specific CVE.
    Affected if The system is not running Windows.

The environment is affected if Google Chrome for Windows is installed with a version lower than 149.0.7827.53, and the attacker has already compromised the renderer process to exploit the SiteIsolation validation flaw.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 149.0.7827.53 or later
Fixed in 149.0.7827.53
Interim mitigation

Update Google Chrome for Windows to version 149.0.7827.53 or later to patch the SiteIsolation validation flaw. Organizations should deploy the update through their endpoint management systems and verify compliance.

Recommended fix High confidence

Chrome 149.0.7827.53 or later

  1. Open Google Chrome and navigate to Settings > Help > About Google Chrome
  2. Verify the current version is below 149.0.7827.53
  3. If an update is available, click 'Update Google Chrome' and wait for the download to complete
  4. Restart Chrome to apply the update
  5. Navigate to chrome://settings/help to confirm the version is now 149.0.7827.53 or later

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Chrome Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA1.0 h
9.0 hours of engineering $1,600
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,560.

Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-11056 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data