CVE-2026-14383: Google Chrome V8 RCE Vulnerability

CVE-2026-14383 Overview

CVE-2026-14383 is a code execution vulnerability in the V8 JavaScript engine used by Google Chrome. The flaw stems from an inappropriate implementation in V8 that affects Chrome versions prior to 150.0.7871.46. A remote attacker can execute arbitrary code inside the Chrome renderer sandbox by luring a user to a crafted HTML page. Chromium classifies the security severity as Medium, while the NVD assigns a higher CVSS score reflecting the network-based attack vector and impact on confidentiality, integrity, and availability. The weakness is categorized under CWE-94, Improper Control of Generation of Code.

Critical Impact
Remote attackers can execute arbitrary code within the Chrome renderer sandbox by convincing a user to visit a crafted web page.

Affected Products

Google Chrome versions prior to 150.0.7871.46
Chromium-based browsers embedding the affected V8 engine build
Desktop Chrome stable channel across supported platforms

Discovery Timeline

2026-07-01 - CVE-2026-14383 published to NVD
2026-07-02 - Last updated in NVD database

Technical Details for CVE-2026-14383

Vulnerability Analysis

The vulnerability resides in V8, the open-source JavaScript and WebAssembly engine that Chrome uses to execute web content. According to the vendor advisory, an inappropriate implementation in V8 allows a remote attacker to execute arbitrary code inside the sandboxed renderer process. Exploitation requires user interaction, specifically loading a crafted HTML page in a vulnerable browser build.

Code executing inside the renderer sandbox does not immediately gain full system access. However, sandboxed code execution provides a strong primitive that attackers commonly chain with a sandbox escape to achieve host compromise. The bug is classified as [CWE-94] Improper Control of Generation of Code, consistent with V8 optimization or code generation errors that permit untrusted script to influence generated machine instructions.

Root Cause

Google discloses limited technical detail while patches propagate to users. The public advisory attributes the flaw to inappropriate implementation logic in V8 rather than a memory corruption primitive such as use-after-free or type confusion. See the Chromium Issue Tracker #492410546 for future public detail once access restrictions are lifted.

Attack Vector

An attacker hosts a crafted HTML page containing malicious JavaScript that triggers the V8 flaw. Victims reach the page through phishing links, malvertising, compromised sites, or embedded iframes on otherwise trusted pages. When the page loads, the attacker-controlled script drives V8 into the vulnerable code path and executes arbitrary code within the renderer sandbox.

No verified proof-of-concept code is publicly available. Refer to the Google Chrome Stable Update for the official disclosure.

Detection Methods for CVE-2026-14383

Indicators of Compromise

Chrome processes spawning unexpected child processes such as command shells, script interpreters, or LOLBins immediately after browser activity
Renderer crashes with V8 or JIT-related stack frames preceding suspicious network connections
Outbound connections from Chrome renderer processes to newly registered domains or IPs hosting HTML payloads

Detection Strategies

Inventory installed Chrome versions across the fleet and flag any build below 150.0.7871.46
Monitor endpoint telemetry for anomalous process lineage descending from chrome.exe or the Chromium renderer
Correlate browser telemetry with proxy and DNS logs to surface visits to suspicious HTML content preceding process anomalies

Monitoring Recommendations

Enable browser update reporting through Chrome Enterprise policies to track patch adoption
Ingest EDR process, network, and file telemetry into a centralized SIEM for cross-source correlation
Alert on renderer sandbox crashes tied to V8 modules that reoccur across multiple endpoints

How to Mitigate CVE-2026-14383

Immediate Actions Required

Update Google Chrome to version 150.0.7871.46 or later on all managed endpoints
Restart browsers after update to ensure the patched V8 engine is loaded into every renderer process
Verify Chromium-based third-party browsers have shipped equivalent V8 fixes and update them accordingly

Patch Information

Google addressed CVE-2026-14383 in the Chrome stable channel update announced on the Chrome Releases blog. Administrators should confirm rollout via chrome://settings/help or through enterprise management tooling. Full details are available in the Google Chrome Stable Update advisory.

Workarounds

Restrict JavaScript execution on untrusted sites using Chrome Enterprise policies until patches are deployed
Enforce Site Isolation and strict content security policies for high-value user groups
Use web filtering and DNS controls to block access to unknown or newly registered domains that could host exploit pages

bash

# Verify installed Chrome version on Linux and Windows endpoints
google-chrome --version
reg query "HKLM\Software\Google\Update\Clients\{8A69D345-D564-463C-AFF1-A69D9E530F96}" /v pv