CVE-2026-14430: Google Chrome V8 RCE Vulnerability

CVE-2026-14430 Overview

CVE-2026-14430 is an integer overflow vulnerability in the V8 JavaScript engine used by Google Chrome. The flaw affects versions of Chrome prior to 150.0.7871.46. A remote attacker can execute arbitrary code inside the Chrome sandbox by convincing a user to visit a crafted HTML page. Google's Chromium team assigned the issue a security severity of High. The vulnerability is tracked under CWE-472 and requires user interaction to trigger.

Critical Impact
Successful exploitation allows arbitrary code execution inside the Chrome sandbox, providing attackers a foothold for further sandbox escape chains and browser compromise.

Affected Products

Google Chrome versions prior to 150.0.7871.46
V8 JavaScript engine bundled with vulnerable Chrome builds
Chromium-based browsers incorporating the affected V8 revision

Discovery Timeline

2026-07-01 - CVE-2026-14430 published to NVD
2026-07-02 - Last updated in NVD database

Technical Details for CVE-2026-14430

Vulnerability Analysis

The vulnerability is an integer overflow inside V8, the JavaScript and WebAssembly engine that powers Chrome. Integer overflow flaws in V8 typically occur when arithmetic operations on 32-bit or 64-bit integers produce values that exceed the representable range. This wrap-around behavior can cause the engine to allocate undersized buffers, miscompute array bounds, or generate incorrect JIT code. An attacker who controls the overflowed value can convert the arithmetic error into an out-of-bounds memory access. The result is arbitrary code execution within the renderer process, which runs inside the Chrome sandbox.

Root Cause

The root cause maps to CWE-472, which describes external control of assumptions used by the underlying logic. In V8, this class of bug commonly appears when the engine trusts a computed size, index, or length value that an attacker can influence through crafted JavaScript. Refer to the Chromium Issue Tracker Entry for engine-specific details once the entry is unrestricted.

Attack Vector

Exploitation occurs over the network and requires user interaction. The victim must load a crafted HTML page that serves malicious JavaScript targeting the V8 engine. Attackers can deliver the payload through phishing links, malvertising, compromised websites, or embedded iframes. No authentication is required. Once triggered, the attacker obtains code execution inside the sandboxed renderer, which is commonly chained with a separate sandbox escape to achieve full host compromise.

Detection Methods for CVE-2026-14430

Indicators of Compromise

Chrome renderer processes crashing with signatures related to V8 Turbofan, Maglev, or heap corruption faults
Unexpected child processes spawned from chrome.exe following visits to untrusted web pages
Outbound connections from renderer processes to attacker-controlled infrastructure hosting exploit JavaScript

Detection Strategies

Inventory installed Chrome versions across the fleet and flag any build below 150.0.7871.46
Monitor endpoint telemetry for browser renderer crashes correlated with visits to newly registered or low-reputation domains
Inspect web proxy logs for HTML responses containing large typed-array allocations or unusual ArrayBuffer manipulations

Monitoring Recommendations

Enable browser crash reporting and forward reports to a central analytics pipeline for anomaly review
Alert on Chrome child processes executing shells, PowerShell, or cmd.exe immediately after browsing activity
Track DNS and HTTP telemetry for domains delivering obfuscated JavaScript payloads targeting V8 internals

How to Mitigate CVE-2026-14430

Immediate Actions Required

Update Google Chrome to version 150.0.7871.46 or later on all managed endpoints
Restart the browser after applying the update to ensure the patched V8 engine is loaded
Push the update to Chromium-based browsers once their vendors ship the corresponding fix

Patch Information

Google addressed the vulnerability in the stable channel release documented in the Google Chrome Desktop Update advisory. Administrators should deploy Chrome 150.0.7871.46 or newer through enterprise update mechanisms such as Google Update, Microsoft Intune, or Jamf policies.

Workarounds

Restrict browsing to trusted domains using enterprise proxy allowlists until patching completes
Disable JavaScript on high-risk endpoints through the DefaultJavaScriptSetting policy where feasible
Deploy site isolation and enforce strict script-source Content Security Policies for internal web applications

bash

# Verify installed Chrome version on Linux endpoints
google-chrome --version

# Enterprise policy example: block JavaScript by default
# /etc/opt/chrome/policies/managed/block_js.json
{
  "DefaultJavaScriptSetting": 2,
  "JavaScriptAllowedForUrls": [
    "https://intranet.example.com"
  ]
}