CVE-2026-102327 in Chrome
Summary
by MITRE • 09/29/2026
Incorrect authorization in WebView in Google Chrome on on Android prior to 154.0.8037.92 allowed a remote attacker who had compromised the renderer process to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Low)
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Analysis
by VulDB Data Team • 09/29/2026
The vulnerability identified in Google Chrome for Android prior to version 154.0.8037.92 represents a critical failure in access control mechanisms within the WebView component, specifically categorized under CWE-269 Improper Privilege Management. This flaw allows an attacker who has already achieved code execution within the renderer process sandbox to escalate privileges and escape the browser's security boundaries. The core technical issue stems from insufficient validation of authorization checks when handling specific interactions between web content and native Android components via WebView APIs. When a malicious HTML page is rendered, it can exploit this misconfiguration to invoke system-level functions or access sensitive resources that are normally restricted to higher-privileged processes, effectively bypassing the isolation guarantees provided by Chrome's multi-process architecture.
From an operational perspective, this vulnerability poses a significant risk because it relies on a chain of exploitation where initial compromise is required within the renderer process. While Chromium classifies the security severity as Low due to the prerequisite condition of renderer compromise, the impact remains severe if that precondition is met through other vectors such as cross-site scripting or drive-by downloads. An attacker leveraging this flaw could execute arbitrary code with elevated privileges outside the sandbox, potentially leading to full device compromise on Android devices running affected versions. This undermines the fundamental security model of modern web browsers, which relies heavily on strict process isolation and privilege separation to contain damage from malicious web content.
The attack vector aligns with ATT&CK techniques related to Defense Evasion and Privilege Escalation, specifically involving exploitation of client-side software for lateral movement or persistence within a compromised environment. The use of a crafted HTML page indicates that the initial entry point is likely through standard web browsing activities, making it accessible via remote attacks if users visit maliciously constructed sites. This highlights the importance of robust input validation and strict enforcement of security policies in hybrid components like WebView, which bridge the gap between untrusted web content and trusted native operating system features.
Mitigation strategies primarily involve immediate patching to version 154.0.8037.92 or later, where Google has addressed the authorization logic flaws within the WebView implementation. Organizations should ensure that automatic updates are enabled for Chrome on Android devices to maintain protection against such vulnerabilities. Additionally, implementing strict Content Security Policies and disabling unnecessary WebView features in custom applications can reduce the attack surface. For enterprise environments, monitoring renderer process anomalies and restricting permissions granted to web views through manifest configurations provide additional layers of defense. Regular security audits focusing on privilege escalation paths within hybrid app architectures are recommended to identify similar misconfigurations before they can be exploited by adversaries seeking to expand their foothold beyond initial sandbox boundaries.