CVE-2026-106228 in Chrome
Summary
by MITRE • 10/06/2026
Confused deputy in Google Lens in Google Chrome prior to 155.0.8059.39 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: Medium)
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Analysis
by VulDB Data Team • 10/08/2026
The vulnerability identified as a confused deputy flaw within Google Lens, specifically affecting versions of Google Chrome prior to 155.0.8059.39, represents a significant breach in the isolation boundaries that are fundamental to modern web browser security architectures. This issue stems from an improper delegation of authority where a component with higher privileges is tricked into performing actions on behalf of a less privileged entity without adequate verification of intent or context. In this specific instance, the vulnerability allows for privilege escalation within the browser environment, moving beyond standard cross-site scripting limitations to enable code execution outside the restrictive sandbox that typically confines renderer processes.
The technical mechanism behind this flaw involves the interaction between the compromised renderer process and the Google Lens service integration. When a user navigates to a maliciously crafted HTML page hosted by an attacker, the renderer process executes the embedded script under normal low-privilege constraints designed to prevent access to system resources or other browser tabs. However, due to the confused deputy condition, certain API calls or data exchanges intended for legitimate Lens functionality are misinterpreted or improperly validated. This allows the malicious code to leverage these trusted pathways to invoke operations that require higher-level permissions, effectively bypassing the sandbox restrictions. The attacker exploits this trust relationship by crafting a page that triggers specific internal functions within Chrome's Lens implementation, which then execute commands in an elevated context without properly checking if the request originated from a legitimate user action or a malicious script injection.
The operational impact of this vulnerability is severe for users relying on Google Chrome for sensitive activities such as online banking, corporate communications, or accessing confidential data. By achieving arbitrary code execution outside the sandbox, an attacker gains the ability to interact with the underlying operating system in ways that are normally prohibited by browser security models. This can lead to full device compromise, including the theft of stored credentials, session cookies, and personal information residing on the local machine. Furthermore, because the attack is triggered via a web page, it facilitates remote exploitation without requiring user interaction beyond visiting the malicious site, significantly lowering the barrier for entry in phishing campaigns or drive-by download attacks.
From an industry standards perspective, this vulnerability aligns with CWE-275, which describes improper handling of undefined or unspecified elevation of privilege requests, and falls under the ATT&CK technique T1068, representing exploitation of software vulnerabilities to gain initial access or escalate privileges within a system. The confusion arises from the failure to correctly distinguish between authorized and unauthorized contexts when delegating tasks, a classic pattern in confused deputy attacks where the victim process acts as an unwitting agent for the attacker's goals.
To mitigate this risk, organizations and individual users must ensure that Google Chrome is updated to version 155.0.8059.39 or later immediately upon availability. This patch addresses the logic errors within the Lens component that allowed the privilege escalation path to be exploited. Additionally, security teams should enforce strict content security policies on internal web applications and monitor for unusual network traffic patterns indicative of exploitation attempts against browser vulnerabilities. Regular auditing of third-party extensions is also recommended, as they can sometimes exacerbate such isolation failures if not properly sandboxed themselves. Maintaining up-to-date software versions remains the most effective defense against these types of complex logic flaws that bypass traditional perimeter defenses.