CVE-2026-11697: Google Chrome RCE Vulnerability

CVE-2026-11697 Overview

CVE-2026-11697 is an input validation vulnerability in the user interface (UI) component of Google Chrome prior to version 149.0.7827.103. A remote attacker can leverage a crafted HTML page to potentially perform a sandbox escape, breaking out of the browser's isolation boundary. Chromium rates the security severity as High. The flaw is tracked under [CWE-20: Improper Input Validation] and affects Chrome on Windows, macOS, and Linux platforms. User interaction is required for exploitation, but successful attacks compromise the confidentiality, integrity, and availability of the host system.

Critical Impact
A remote attacker can escape the Chrome sandbox via a crafted HTML page, gaining code execution outside the browser's isolation boundary on Windows, macOS, and Linux endpoints.

Affected Products

Google Chrome prior to 149.0.7827.103
Microsoft Windows (Chrome desktop builds)
Apple macOS and Linux (Chrome desktop builds)

Discovery Timeline

2026-06-09 - CVE-2026-11697 published to NVD
2026-06-09 - Last updated in NVD database
2026-06-09 - Google publishes Stable Channel Update for Desktop

Technical Details for CVE-2026-11697

Vulnerability Analysis

The vulnerability resides in Chrome's UI layer, where untrusted input from a web page is not adequately validated before being processed by privileged browser components. A crafted HTML page can deliver input that the UI accepts and acts upon without proper sanitization. The defect chains UI-layer input handling with cross-process trust boundaries, enabling a sandboxed renderer's content to influence higher-privileged browser code. The scope is changed (S:C in the CVSS vector), reflecting that exploitation crosses from the renderer sandbox into the broader browser process and the host operating system.

At the time of publication, no public proof-of-concept or exploit code is available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. The current EPSS probability remains low.

Root Cause

The root cause is classified under [CWE-20: Improper Input Validation]. Chrome's UI surface accepts data that originates from web content without enforcing the validation required before that data crosses a trust boundary. Because the UI runs with higher privileges than renderer processes, untrusted input that reaches it can be used to subvert sandbox enforcement.

Attack Vector

Exploitation requires a victim to visit a malicious or compromised web page. Once the crafted HTML is rendered, the page triggers the unsafe UI code path. The attack is network-reachable, requires no authentication, and depends on user interaction such as loading the page or activating a UI element. A successful chain results in sandbox escape, allowing attacker-controlled code to execute outside Chrome's renderer isolation. Technical specifics are restricted; see the Chromium Issue Tracker Entry for additional context as access is opened.

Detection Methods for CVE-2026-11697

Indicators of Compromise

Chrome browser processes (chrome.exe, Google Chrome Helper, chrome) spawning unexpected child processes such as command shells, scripting hosts, or LOLBins.
Renderer or GPU process crashes followed immediately by new process creation under the user's session.
Outbound HTTPS connections from Chrome to newly registered or low-reputation domains hosting attacker-controlled HTML.
File writes to user-writable persistence locations (Startup folders, ~/Library/LaunchAgents, ~/.config/autostart) initiated by Chrome child processes.

Detection Strategies

Hunt for Chrome versions below 149.0.7827.103 across managed endpoints using software inventory telemetry.
Alert on anomalous parent-child process relationships where Chrome spawns interpreters (powershell.exe, cmd.exe, bash, osascript).
Correlate browser crash events with subsequent process creation or file system modifications within a short time window.

Monitoring Recommendations

Forward EDR process telemetry and browser crash logs to a centralized analytics pipeline for behavioral correlation.
Monitor proxy and DNS logs for traffic to domains delivering unsolicited HTML pages with heavy scripting or UI manipulation.
Track Chrome update compliance through endpoint management tooling and flag any host that remains on a vulnerable build.

How to Mitigate CVE-2026-11697

Immediate Actions Required

Update Google Chrome to version 149.0.7827.103 or later on Windows, macOS, and Linux endpoints.
Restart Chrome after applying the update to ensure the patched binary is loaded into memory.
Verify deployment by checking chrome://settings/help or querying installed versions through endpoint management.
Prioritize patching for users who routinely browse external or untrusted content.

Patch Information

Google released the fix in the Stable Channel update detailed at the Google Chrome Update Announcement. Chromium-based browsers that incorporate the same upstream fix should be updated to their corresponding patched builds. Enterprise administrators should push the update through Group Policy, Jamf, Intune, or equivalent management platforms.

Workarounds

Enforce automatic Chrome updates through enterprise policy until all endpoints reach 149.0.7827.103 or later.
Restrict browsing to trusted sites via web filtering or secure web gateway policies while patching is in progress.
Disable or limit execution of unnecessary browser extensions that increase the UI attack surface.
Apply application allow-listing to prevent Chrome child processes from launching scripting interpreters.

bash

# Configuration example: verify Chrome version on Linux/macOS
google-chrome --version
# Expected output: Google Chrome 149.0.7827.103 or later

# Windows (PowerShell): query installed Chrome version
(Get-Item "C:\Program Files\Google\Chrome\Application\chrome.exe").VersionInfo.ProductVersion