CVE-2026-11662: Google Chrome RCE Vulnerability

CVE-2026-11662 Overview

CVE-2026-11662 is a type confusion vulnerability in the Bindings component of Google Chrome prior to version 149.0.7827.103. The flaw allows a remote attacker to execute arbitrary code inside the renderer sandbox through a crafted HTML page. Chromium rates the security severity as High. The issue is tracked under CWE-843: Access of Resource Using Incompatible Type.

Exploitation requires the victim to visit attacker-controlled web content. Successful exploitation yields code execution within the sandboxed renderer process, which attackers typically chain with a sandbox escape to compromise the host.

Critical Impact
A remote attacker can execute arbitrary code in the Chrome renderer process by serving a crafted HTML page to any user running an unpatched Chrome build.

Affected Products

Google Chrome prior to 149.0.7827.103 on Microsoft Windows
Google Chrome prior to 149.0.7827.103 on Apple macOS
Google Chrome prior to 149.0.7827.103 on Linux

Discovery Timeline

2026-06-09 - CVE-2026-11662 published to NVD
2026-06-09 - Last updated in NVD database
2026-06 - Google releases stable channel update fixing the issue (see Chrome Blog Desktop Update)

Technical Details for CVE-2026-11662

Vulnerability Analysis

The vulnerability is a type confusion in Chrome's Bindings layer, the code that bridges JavaScript objects to native C++ implementations in Blink and V8. Type confusion occurs when code interprets a memory region as one type while it actually holds another type. The mismatch lets an attacker manipulate object internals, including vtables, lengths, and pointers, in unintended ways.

In the Chrome Bindings context, attacker JavaScript can trigger an object cast that bypasses the expected runtime check. The resulting confused object permits arbitrary read and write primitives inside the renderer address space. From there, an attacker pivots to a control flow hijack and arbitrary code execution within the renderer sandbox. The user interaction requirement reflects that a victim must load the malicious HTML page in Chrome.

Root Cause

The root cause is improper type validation in the Bindings component. When JavaScript passes an object to a native binding, the code path assumes a specific concrete type without enforcing the check across all reachable states. A crafted prototype chain or object reshape leads the binding to operate on an object of an incompatible type. Refer to the Chromium Issue Tracker Entry for upstream tracking.

Attack Vector

The attack is network-based and requires user interaction. An attacker hosts a crafted HTML page that loads JavaScript designed to trigger the type confusion. When a victim visits the page, including via malvertising, phishing links, or a compromised site, the renderer process executes attacker-controlled native code. The arbitrary code runs inside the renderer sandbox and typically requires a separate sandbox escape to affect the host operating system.

No public proof-of-concept is referenced in the advisory, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog at publication.

Detection Methods for CVE-2026-11662

Indicators of Compromise

Chrome renderer process crashes with signatures consistent with type confusion such as SIGSEGV on indirect calls or vtable dereferences.
Outbound connections from Chrome renderer or helper processes to unexpected hosts following web browsing activity.
Creation of child processes from chrome.exe or Google Chrome Helper (Renderer) that spawn shells, scripting engines, or LOLBins.
Browsing telemetry showing visits to newly registered or low-reputation domains immediately before suspicious endpoint activity.

Detection Strategies

Inventory installed Chrome versions across the fleet and flag any build below 149.0.7827.103.
Hunt for anomalous process lineage where a Chrome renderer process is the parent of cmd.exe, powershell.exe, bash, or osascript.
Correlate browser navigation events with subsequent file writes to user-writable paths and persistence locations.

Monitoring Recommendations

Enable browser telemetry forwarding to a central log store and retain navigation and extension events for at least 30 days.
Alert on Chrome crash dumps tagged with type confusion or V8 indicators to identify exploitation attempts at scale.
Monitor egress traffic from endpoints to identify post-exploitation command-and-control patterns following browser activity.

How to Mitigate CVE-2026-11662

Immediate Actions Required

Update Chrome to version 149.0.7827.103 or later on Windows, macOS, and Linux endpoints.
Force a browser restart on managed endpoints to ensure the patched binary is loaded by all renderer processes.
Audit and update Chromium-based browsers and embedded WebViews that share the affected Bindings code.
Restrict execution of untrusted JavaScript through enterprise policies where feasible.

Patch Information

Google fixed the issue in the Chrome stable channel update referenced in the Chrome Blog Desktop Update. Administrators using Chrome Browser Cloud Management or group policy should push the update and verify the installed version via chrome://version. Linux distributions should pull the vendor package update for Chrome and any Chromium-derived browsers.

Workarounds

Disable JavaScript for untrusted sites using the DefaultJavaScriptSetting enterprise policy until patching is complete.
Deploy site isolation and strict origin policies through Chrome enterprise configuration to limit cross-origin attack surface.
Use network filtering to block known malicious domains and reduce exposure to drive-by attacks.

bash

# Verify the installed Chrome version meets or exceeds the fixed build
google-chrome --version
# Expected: Google Chrome 149.0.7827.103 or later

# Windows enterprise policy: enforce automatic updates via registry
reg add "HKLM\SOFTWARE\Policies\Google\Update" /v UpdateDefault /t REG_DWORD /d 1 /f