CVE-2026-13997: Google Chrome XSS Vulnerability

CVE-2026-13997 Overview

CVE-2026-13997 is a user interface spoofing vulnerability in the Extensions component of Google Chrome on Android. Versions prior to 150.0.7871.47 fail to render security UI correctly, allowing a remote attacker to mislead users through a crafted HTML page. Successful exploitation requires the victim to perform specific UI gestures, which raises the attack complexity. Google classifies the Chromium severity as Medium and the flaw maps to CWE-451: User Interface (UI) Misrepresentation of Critical Information.

Critical Impact
An attacker can spoof browser security indicators tied to Extensions, deceiving mobile users into trusting attacker-controlled content or actions.

Affected Products

Google Chrome on Android versions prior to 150.0.7871.47
Google Android devices running affected Chrome builds
Chromium-based components exposing the Extensions security UI

Discovery Timeline

2026-06-30 - CVE-2026-13997 published to the National Vulnerability Database
2026-07-01 - Last updated in NVD database

Technical Details for CVE-2026-13997

Vulnerability Analysis

The defect resides in how Chrome on Android renders security-relevant UI elements associated with browser Extensions. When a crafted HTML page triggers specific user gestures, the browser draws or updates UI in a way that misrepresents the origin, permissions, or trust state of extension-related surfaces. The attacker never gains code execution, but the deceptive rendering enables convincing phishing, permission grant baiting, or fraudulent extension prompts.

Exploitation is fully remote and requires no privileges, only a user visit to attacker-controlled content and interaction with the crafted page. Because the flaw manipulates trusted browser chrome rather than injecting content into a page, users cannot rely on standard visual cues to detect the deception. The mobile form factor amplifies the risk, as limited screen space reduces the number of trust indicators users can inspect.

Root Cause

The root cause is incorrect security UI logic within the Extensions subsystem, catalogued under CWE-451. Chrome fails to guarantee that security-critical UI elements accurately reflect the underlying state during certain gesture-driven transitions, allowing overlays or reordering that misrepresent context. Public technical details are limited pending broader patch deployment, per the Chromium Issue Tracker Entry.

Attack Vector

A remote attacker hosts a crafted HTML page and lures a mobile user to visit it. The page uses scripted content and layout to prompt specific user gestures such as taps or scrolls. Those gestures drive the browser into a state where extension-related security UI is misrendered, allowing the attacker to spoof trust indicators or hijack user decisions.

// No verified proof-of-concept is publicly available for CVE-2026-13997.
// See the Chromium Issue Tracker (issue 514069689) for technical context.

Detection Methods for CVE-2026-13997

Indicators of Compromise

Mobile Chrome telemetry showing users installing or granting permissions to unfamiliar extensions after visiting external HTML pages
Anomalous navigation flows where users transition from untrusted domains directly into extension management or permission surfaces
User-reported inconsistencies between displayed extension origin and actual publisher

Detection Strategies

Inventory Chrome for Android versions across managed mobile devices and flag builds earlier than 150.0.7871.47
Correlate web proxy logs with mobile browser telemetry to surface visits to newly registered domains preceding extension permission changes
Hunt for phishing kits that specifically target Chrome mobile UI patterns using threat intelligence feeds

Monitoring Recommendations

Enable enterprise reporting for Chrome on Android via Chrome Browser Cloud Management to track version compliance and extension events
Monitor Mobile Device Management (MDM) inventory for delayed Chrome updates and enforce minimum version policies
Track user-submitted phishing reports for patterns citing unexpected browser prompts on mobile

How to Mitigate CVE-2026-13997

Immediate Actions Required

Update Google Chrome on Android to version 150.0.7871.47 or later through the Google Play Store
Push the minimum Chrome version policy through MDM to accelerate rollout on managed Android fleets
Deliver targeted user awareness reminders about verifying extension prompts and browser dialogs on mobile

Patch Information

Google addressed CVE-2026-13997 in Chrome 150.0.7871.47. Refer to the Google Chrome Stable Channel Update for release details and the Chromium Issue Tracker Entry for the underlying bug reference.

Workarounds

Restrict installation of non-approved Chrome extensions via enterprise policy where supported
Advise users to avoid completing gesture-driven prompts on unfamiliar sites until the patch is applied
Route mobile web traffic through a secure web gateway that blocks known phishing and spoofing infrastructure

bash

# Enforce a minimum Chrome for Android version via MDM (example: Android Enterprise managed configuration)
# Set the following key in the Chrome managed configuration payload:
#   MinimumVersion = 150.0.7871.47
# Devices running older builds will be blocked from launching Chrome until updated.