CVE-2026-102327 Overview
CVE-2026-102327 is an incorrect authorization vulnerability [CWE-863] in the WebView component of Google Chrome on Android. Versions prior to 154.0.8037.92 fail to enforce authorization checks correctly, allowing a remote attacker who has already compromised the renderer process to potentially execute arbitrary code outside the sandbox. Exploitation requires a crafted HTML page and user interaction. Google's Chromium team rated the internal security severity as Low, while the NVD-assigned CVSS score is 7.5 (HIGH) reflecting the potential for sandbox escape.
Critical Impact
A compromised renderer process can break out of the Chrome sandbox on Android devices, gaining code execution outside the intended security boundary through a crafted HTML page.
Affected Products
- Google Chrome for Android versions prior to 154.0.8037.92
- Google Android devices running vulnerable Chrome WebView builds
- Applications embedding Chrome WebView on Android
Discovery Timeline
- 2026-09-29 - CVE-2026-102327 published to NVD
- 2026-09-30 - Last updated in NVD database
Technical Details for CVE-2026-102327
Vulnerability Analysis
The flaw resides in Chrome's WebView implementation on Android, where an authorization decision is made incorrectly when the renderer process requests privileged operations. WebView is the system component that renders web content inside Chrome and inside third-party Android applications, so the attack surface extends beyond the browser itself.
An attacker first needs a foothold in the renderer process, typically achieved by chaining this issue with a separate memory corruption bug in Blink or V8. Once the renderer is compromised, the flawed authorization check permits actions that should remain confined to the sandbox. The result is code execution in a higher-privilege context on the Android device.
Root Cause
The root cause is classified under [CWE-863] Incorrect Authorization. The WebView code path performs an access decision that trusts input or state controllable from the compromised renderer, rather than validating the request against the browser process authorization policy. This design gap makes it possible to invoke privileged interfaces that should be unreachable from a sandboxed renderer.
Attack Vector
Exploitation follows a two-stage model. The attacker delivers a crafted HTML page that triggers a renderer compromise, then leverages the authorization flaw to escape the sandbox. The vector is network-based and requires user interaction, such as visiting a malicious page or opening attacker-controlled content within an app that embeds WebView. No verified public proof-of-concept code is available. For technical background, see Chromium Issue #496212975.
Detection Methods for CVE-2026-102327
Indicators of Compromise
- Chrome for Android processes spawning unexpected child processes or executing outside the standard sandbox context.
- Unusual outbound network connections originating from apps that embed WebView following user navigation to unfamiliar URLs.
- Android crash reports referencing WebView renderer termination followed by anomalous process activity.
Detection Strategies
- Inventory managed Android devices and identify Chrome installations reporting a version earlier than 154.0.8037.92.
- Monitor mobile threat defense telemetry for renderer process crashes correlated with follow-on privileged activity.
- Correlate web proxy logs with device telemetry to surface users who accessed suspicious HTML content before anomalous behavior.
Monitoring Recommendations
- Enable mobile endpoint telemetry collection to capture process lineage and network activity from Chrome and WebView-based apps.
- Ingest browser version inventory into a centralized data lake and alert on devices running vulnerable Chrome builds.
- Track access to the Google Chrome Stable Update advisory feed to accelerate identification of newly disclosed WebView flaws.
How to Mitigate CVE-2026-102327
Immediate Actions Required
- Update Google Chrome on Android to version 154.0.8037.92 or later through Google Play.
- Update the Android System WebView component to the matching patched release, as third-party apps rely on it.
- Enforce automatic app updates via mobile device management (MDM) policies for enrolled Android devices.
Patch Information
Google addressed the vulnerability in Chrome for Android 154.0.8037.92. Full patch details are documented in the Google Chrome Stable Update advisory and the associated Chromium Issue #496212975. Administrators managing fleets should validate that both Chrome and Android System WebView are updated, since the latter services WebView-consuming applications independently.
Workarounds
- Restrict browsing on managed Android devices to trusted domains through mobile threat defense URL filtering until the patch is applied.
- Disable or restrict use of third-party applications that embed WebView for untrusted content until the WebView component is updated.
- Apply MDM policies that block installation of Chrome versions below 154.0.8037.92.
# Example MDM query to identify vulnerable Chrome installations on Android
adb shell dumpsys package com.android.chrome | grep versionName
# Expected patched output: versionName=154.0.8037.92 or later
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
