CVE-2026-14118: Google Chrome Information Disclosure Flaw

CVE-2026-14118 Overview

CVE-2026-14118 is an insufficient data validation vulnerability in the DevTools component of Google Chrome versions prior to 150.0.7871.47. A remote attacker can leak cross-origin data by convincing a user to perform specific UI gestures on a crafted HTML page. The flaw is tracked under CWE-290 (Authentication Bypass by Spoofing) and CWE-20 (Improper Input Validation). Google classifies the internal Chromium severity as Low, while the NVD assigns a CVSS 3.1 score of 6.5. Successful exploitation breaks the same-origin policy expectations enforced by DevTools and exposes sensitive cross-origin content to attacker-controlled pages.

Critical Impact
A remote attacker can exfiltrate cross-origin data from a victim browser session when the user is lured into performing crafted UI interactions on a malicious page.

Affected Products

Google Chrome for Desktop versions prior to 150.0.7871.47
Chromium-based builds shipping the vulnerable DevTools component
Downstream browsers built on the affected Chromium versions until rebased

Discovery Timeline

2026-06-30 - CVE-2026-14118 published to NVD
2026-07-02 - Last updated in NVD database

Technical Details for CVE-2026-14118

Vulnerability Analysis

The vulnerability resides in Chrome DevTools, the built-in developer tooling exposed inside the browser. DevTools performs privileged operations on behalf of the user and interacts with page content across origin boundaries. Insufficient validation of data handled by DevTools allows a crafted HTML page to influence its behavior when the user is tricked into specific UI gestures. The result is a cross-origin data leak, undermining the same-origin policy that isolates content between web origins. User interaction is required, which reduces the ease of exploitation but does not eliminate risk for phishing-driven or social-engineering scenarios. The EPSS probability at publication is 0.232%, reflecting the reliance on user interaction.

Root Cause

The root cause is improper validation of input data processed by DevTools (CWE-20). Combined with an authentication or origin spoofing weakness (CWE-290), the flaw permits attacker-supplied content to appear trustworthy to DevTools logic. As a consequence, DevTools returns or exposes data that should have remained restricted by origin isolation.

Attack Vector

Exploitation is network-based. The attacker hosts a crafted HTML page and lures the victim to visit it. The victim must perform specific UI gestures, such as clicks or drag operations, that trigger the vulnerable DevTools code path. Once triggered, the attacker-controlled page reads data belonging to a different origin. No credentials or elevated privileges are required on the target system. Additional technical detail is tracked in the Chromium Issue Tracker Entry.

Detection Methods for CVE-2026-14118

Indicators of Compromise

Browser telemetry showing Chrome versions earlier than 150.0.7871.47 in active use across the fleet
Web proxy logs indicating navigation to unknown domains immediately followed by unexpected cross-origin resource requests
User reports of pages instructing them to perform unusual click or drag sequences to "continue" or "verify"

Detection Strategies

Inventory installed Chrome versions using endpoint management tooling and flag hosts running builds prior to 150.0.7871.47
Correlate DNS and HTTP telemetry with threat intelligence feeds to identify visits to phishing pages that pair with social-engineering UI prompts
Review Chrome update deployment reports to confirm the fixed build has reached all managed endpoints

Monitoring Recommendations

Ingest browser version data into the security data lake and alert on out-of-date Chrome installations
Monitor for anomalous outbound requests originating from browser processes shortly after navigation to newly observed domains
Track failed or delayed Chrome auto-update events on managed endpoints to detect systems that remain exposed

How to Mitigate CVE-2026-14118

Immediate Actions Required

Update Google Chrome to version 150.0.7871.47 or later on all Windows, macOS, and Linux endpoints
Force a restart of Chrome after update deployment to ensure the patched binary is loaded
Verify that Chromium-based browsers and embedded webviews in the environment have rebased onto the fixed version

Patch Information

Google addressed CVE-2026-14118 in the Stable channel release documented in the Google Chrome Update Announcement. The fixed version is 150.0.7871.47. No official workaround exists outside of applying the vendor patch.

Workarounds

Deliver user awareness guidance warning against performing unusual UI gestures requested by untrusted web pages
Restrict access to untrusted external sites through web filtering while patch deployment is in progress
Enforce enterprise policy to disable DevTools for standard users where operationally acceptable until the patched build is deployed

bash

# Enforce a minimum Chrome version via enterprise policy (Windows example)
# Registry path: HKLM\Software\Policies\Google\Chrome
reg add "HKLM\Software\Policies\Google\Chrome" /v "TargetVersionPrefix" /t REG_SZ /d "150.0.7871.47" /f

# Optional: disable Developer Tools for standard users during rollout
reg add "HKLM\Software\Policies\Google\Chrome" /v "DeveloperToolsAvailability" /t REG_DWORD /d 2 /f