CVE-2026-14395: Google Chrome V8 RCE Vulnerability

CVE-2026-14395 Overview

CVE-2026-14395 is an out-of-bounds write vulnerability in the V8 JavaScript engine used by Google Chrome. Versions prior to 150.0.7871.46 are affected. A remote attacker can exploit the flaw by serving a crafted HTML page to a target user. Successful exploitation allows arbitrary code execution inside the Chrome renderer sandbox.

The vulnerability is classified under CWE-787: Out-of-bounds Write. Chromium's security team rated the underlying severity as Low, but the CVSS score reflects meaningful impact on confidentiality, integrity, and availability because renderer compromise is a common first stage in browser exploit chains.

Critical Impact
Remote attackers can execute arbitrary code inside the Chrome sandbox by luring users to a malicious HTML page, providing a foothold for further exploitation.

Affected Products

Google Chrome versions prior to 150.0.7871.46
Chromium-based browsers embedding the affected V8 engine build
Desktop Stable channel distributions of Chrome across Windows, macOS, and Linux

Discovery Timeline

2026-07-01 - CVE-2026-14395 published to NVD
2026-07-02 - Last updated in NVD database

Technical Details for CVE-2026-14395

Vulnerability Analysis

The issue resides in V8, the JavaScript and WebAssembly engine that powers Chrome. V8 performs just-in-time (JIT) compilation and manages memory for JavaScript objects. An out-of-bounds write occurs when the engine writes data past the boundary of an allocated buffer, corrupting adjacent memory structures.

An attacker delivers a crafted HTML page that includes JavaScript designed to trigger the flawed code path. When Chrome parses and executes the script, V8 writes attacker-controlled data outside the intended memory region. This corruption can be shaped into a controlled read/write primitive, ultimately leading to arbitrary code execution inside the renderer process.

Execution is confined to the Chrome sandbox. However, sandbox-scoped code execution is routinely chained with a separate sandbox escape to achieve full compromise of the host.

Root Cause

The root cause is missing or incorrect bounds enforcement inside V8 when handling specific JavaScript operations. The engine writes beyond the end of a memory allocation, corrupting heap metadata or adjacent objects. This memory safety failure aligns with CWE-787.

Attack Vector

Exploitation requires user interaction. A victim must visit a page controlled or influenced by the attacker, or open attacker-supplied HTML content. No authentication is required, and the attack traverses the network. See the Google Chrome Stable Update advisory and the Chromium Issue Tracker Entry for additional context.

Detection Methods for CVE-2026-14395

Indicators of Compromise

Chrome renderer processes crashing or spawning unexpected child processes shortly after visiting untrusted sites
Outbound connections from chrome.exe renderer processes to newly registered or low-reputation domains
Browser installations reporting a version string below 150.0.7871.46 in enterprise inventory data

Detection Strategies

Inventory endpoints to identify Chrome instances running builds earlier than 150.0.7871.46
Alert on renderer process anomalies such as unexpected memory allocations, code execution from non-executable regions, or crashes referencing V8 frames
Correlate web proxy logs with endpoint telemetry to identify users who visited suspicious domains preceding renderer crashes

Monitoring Recommendations

Ingest browser process telemetry and crash reports into a centralized analytics platform for baseline comparison
Monitor for post-exploitation behaviors including credential access, script interpreter launches from browser processes, and persistence attempts
Track advisories from the Chromium project and correlate CVE identifiers with deployed browser versions

How to Mitigate CVE-2026-14395

Immediate Actions Required

Update Google Chrome to version 150.0.7871.46 or later on all managed endpoints
Enforce automatic browser updates through enterprise policy to reduce exposure windows
Restart Chrome after updates so the patched V8 binary is loaded into memory

Patch Information

Google addressed the vulnerability in Chrome Stable channel release 150.0.7871.46. Refer to the Google Chrome Stable Update release notes for distribution details and to the Chromium Issue Tracker Entry for the underlying bug reference.

Workarounds

Restrict browsing to trusted domains using web filtering or DNS reputation controls until patches are deployed
Deploy site isolation and enhanced sandboxing policies to limit the impact of renderer compromise
Disable or restrict JavaScript execution on untrusted origins via enterprise policy where operationally feasible

bash

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

# Windows: query the installed Chrome version from the registry
reg query "HKLM\SOFTWARE\Google\Chrome\BLBeacon" /v version

# macOS: read the Info.plist version key
defaults read /Applications/Google\ Chrome.app/Contents/Info CFBundleShortVersionString