CVE-2026-17741: Google Chrome WebView RCE Vulnerability

CVE-2026-17741 Overview

CVE-2026-17741 is an input validation vulnerability [CWE-20] in the WebView component of Google Chrome on Android. Versions prior to 151.0.7922.72 fail to properly validate untrusted input processed by WebView. A remote attacker can leverage a crafted HTML page to potentially perform a sandbox escape. Chromium rates the security severity as Medium.

The vulnerability affects Chrome's Android platform specifically, where WebView is heavily used to render web content inside applications. Successful exploitation could allow an attacker to break out of the WebView sandbox boundary that isolates web content from the host operating system.

Critical Impact
A remote attacker can host a crafted HTML page that, when rendered by a vulnerable WebView, may escape the sandbox and access resources beyond the browser process boundary.

Affected Products

Google Chrome on Android prior to 151.0.7922.72
Android applications embedding Chromium-based WebView prior to version 151
Downstream Chromium-based browsers on Android that have not integrated the version 151 fix

Discovery Timeline

2026-07-30 - CVE-2026-17741 published to NVD
2026-07-30 - Last updated in NVD database

Technical Details for CVE-2026-17741

Vulnerability Analysis

The flaw resides in Chrome's WebView implementation on Android. WebView renders web content within native applications and enforces a sandbox that isolates that content from the host process and device resources. Insufficient validation of untrusted input within this component undermines that boundary.

When the WebView processes attacker-controlled HTML, malformed or unexpected input can trigger conditions that lead to a sandbox escape. This class of issue is tracked under [CWE-20: Improper Input Validation]. Chromium classifies the severity as Medium, indicating the escape path requires specific conditions or interaction rather than trivial remote execution.

Root Cause

The root cause is improper validation of untrusted input processed by WebView. Input that should be constrained by the parser or the inter-process boundary is accepted without adequate sanity checks. This lets attacker-controlled data influence code paths that were intended to be reachable only by trusted internal state.

Attack Vector

Exploitation requires a victim to load attacker-controlled HTML in a vulnerable Chrome for Android build or in an Android app that embeds a vulnerable WebView. Common delivery mechanisms include phishing links, malicious advertisements, compromised sites, and in-app content loaded from untrusted origins.

No verified proof-of-concept code is publicly available. Refer to the Chromium Issue Tracker Entry and the Google Chrome Update Announcement for vendor-provided technical context.

Detection Methods for CVE-2026-17741

Indicators of Compromise

Android devices or applications reporting Chrome or WebView versions below 151.0.7922.72
Unexpected child processes, file writes, or network connections originating from browser or WebView-hosting app processes after rendering third-party HTML
Crash reports from the WebView renderer referencing input parsing or IPC boundary faults

Detection Strategies

Inventory installed Chrome and Android System WebView versions across managed mobile fleets and flag builds earlier than 151.
Monitor mobile application telemetry for anomalous behavior in apps that embed WebView, such as unexpected access to app-private storage.
Correlate web proxy logs with device browser versions to identify vulnerable clients rendering content from untrusted origins.

Monitoring Recommendations

Enable mobile threat defense logging for Chrome and WebView-hosting applications and forward events to a central analytics platform.
Track Google Play update compliance for Chrome and Android System WebView, and alert when devices lag behind the fixed version.
Review URL reputation and category telemetry to identify user exposure to newly registered or low-reputation HTML content.

How to Mitigate CVE-2026-17741

Immediate Actions Required

Update Google Chrome on Android to version 151.0.7922.72 or later through Google Play.
Update the Android System WebView package to the version 151 stable release on all managed devices.
Prompt users on unmanaged devices to install pending Chrome and WebView updates.

Patch Information

Google addressed the vulnerability in the Chrome for Android stable channel at version 151.0.7922.72. The corresponding Chromium fix is referenced in the Chromium Issue Tracker Entry and announced in the Google Chrome Update Announcement. Android applications that bundle their own Chromium-based WebView must rebase to a fixed release.

Workarounds

Restrict WebView content loading in enterprise-managed apps to trusted origins using URL allowlists.
Advise users to avoid loading untrusted links in Chrome on Android until the update is applied.
Use mobile device management policies to enforce automatic updates for Chrome and Android System WebView.

bash

# Verify installed Chrome version on an Android device via ADB
adb shell dumpsys package com.android.chrome | grep versionName

# Verify installed Android System WebView version
adb shell dumpsys package com.google.android.webview | grep versionName