CVE-2026-14110: Google Chrome XSS Vulnerability

CVE-2026-14110 Overview

CVE-2026-14110 is a user interface (UI) spoofing vulnerability in the DarkMode component of Google Chrome versions prior to 150.0.7871.47. A remote attacker can craft a malicious HTML page that manipulates the browser's dark mode rendering to mislead users about the origin or trustworthiness of content. The flaw maps to CWE-1021 (Improper Restriction of Rendered UI Layers or Frames) and CWE-451 (User Interface Misrepresentation of Critical Information). Chromium engineers rated the internal severity as Low. Exploitation requires user interaction, and the vulnerability does not directly compromise confidentiality or availability.

Critical Impact
Attackers can craft HTML pages that abuse DarkMode rendering to spoof browser UI elements, enabling phishing and social-engineering attacks against Chrome users on unpatched builds.

Affected Products

Google Chrome versions prior to 150.0.7871.47
Chromium-based desktop builds sharing the vulnerable DarkMode implementation
All operating systems supported by the Chrome Stable channel (Windows, macOS, Linux)

Discovery Timeline

2026-06-30 - CVE-2026-14110 published to NVD
2026-07-02 - Last updated in NVD database

Technical Details for CVE-2026-14110

Vulnerability Analysis

The vulnerability resides in Chrome's DarkMode implementation, which automatically adjusts colors of web content and browser chrome to match a dark theme. An inappropriate implementation allows a crafted HTML page to influence how content is rendered under dark mode. This creates conditions where UI elements can be misrepresented to the user. The issue is classified as UI spoofing rather than memory corruption or code execution.

The integrity impact is limited to what an attacker can convincingly display, but this is sufficient to enable phishing, address bar deception, or fake security prompts. User interaction is required, meaning a victim must visit or interact with the attacker-controlled page. No privileges are needed on the target system, and the attack is delivered over the network via standard web content.

Root Cause

The root cause is an inappropriate implementation in the DarkMode rendering path. Color inversion or theme application logic fails to properly isolate attacker-controlled content from trusted UI cues. This allows crafted HTML and CSS to blend with or imitate browser-owned interface elements when dark mode is active. Details are tracked in the Chromium Issue Tracker Entry.

Attack Vector

An attacker hosts a malicious page and lures a victim to visit it in a vulnerable Chrome build with dark mode enabled. The crafted HTML manipulates DarkMode-applied styling to overlay or mimic trusted UI, such as security indicators, dialogs, or address bar content. Users are then more likely to trust attacker-controlled content or submit credentials to a spoofed interface.

No exploit code, public proof-of-concept, or evidence of in-the-wild exploitation is available at the time of publication. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.

Detection Methods for CVE-2026-14110

Indicators of Compromise

Chrome desktop clients reporting a version string below 150.0.7871.47 in telemetry or asset inventory
User reports of visual anomalies, mismatched theming, or unexpected overlays on login and consent pages
Web proxy or DNS logs showing visits to newly registered domains hosting HTML pages that force dark mode styling on sensitive forms

Detection Strategies

Inventory installed browser versions across managed endpoints and flag any Chrome build earlier than 150.0.7871.47.
Correlate phishing report tickets with browser version metadata to identify potential exploitation attempts against unpatched hosts.
Monitor network traffic for suspicious HTML content served with aggressive prefers-color-scheme: dark styling combined with overlays covering address bar or security UI regions.

Monitoring Recommendations

Enable browser version reporting through enterprise Chrome management or endpoint agents to surface non-compliant clients.
Route user-reported phishing samples through automated analysis to detect DarkMode-based UI spoofing techniques.
Track visits to low-reputation domains and correlate with authentication events to identify successful spoofing outcomes.

How to Mitigate CVE-2026-14110

Immediate Actions Required

Update Google Chrome to version 150.0.7871.47 or later on all managed endpoints.
Force browser restarts through endpoint management tooling to ensure the patch is applied.
Verify third-party Chromium-based browsers have adopted the corresponding upstream fix before considering the risk closed.

Patch Information

Google addressed CVE-2026-14110 in Chrome Stable channel release 150.0.7871.47. Refer to the Google Chrome Update Announcement for the official release notes and rollout schedule. Enterprise administrators should validate deployment via Chrome Browser Cloud Management or equivalent tooling.

Workarounds

Disable dark mode in Chrome via chrome://flags or enterprise policy until the patched build is deployed.
Deploy phishing-resistant authentication such as WebAuthn or FIDO2 to reduce the impact of UI spoofing on credential theft.
Provide targeted user awareness guidance about verifying URLs and security indicators, especially when dark themes are active.

bash

# Configuration example: verify Chrome version on Linux endpoints
google-chrome --version

# Enterprise policy snippet (Windows registry) to force auto-update
reg add "HKLM\Software\Policies\Google\Update" /v UpdateDefault /t REG_DWORD /d 1 /f