CVE-2026-106369 in Chrome
Summary
by MITRE • 10/07/2026
Missing authorization in Translate in Google Chrome prior to 155.0.8059.39 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified as missing authorization within the Translate component of Google Chrome prior to version 155.0.8059.39 represents a critical failure in access control mechanisms that governs inter-process communication and data handling. This flaw specifically impacts the browser's ability to enforce site isolation, a fundamental security architecture designed to prevent malicious websites from accessing sensitive data belonging to other sites. Site isolation relies on strict boundaries between different origins, ensuring that renderer processes cannot read or manipulate content from unrelated domains. When authorization checks are absent in components like Translate, these boundaries can be eroded, allowing compromised entities within the browser environment to cross trust lines that should remain impenetrable.
From a technical perspective, this vulnerability stems from an insufficient verification of permissions when handling translation-related operations. In modern browsers, renderer processes operate with limited privileges to contain potential exploits. However, if a specific feature such as automatic text translation lacks proper authorization checks, it may inadvertently expose internal APIs or data structures to untrusted contexts. An attacker who has already achieved code execution within the renderer process through another vector can leverage this missing check to perform actions that require higher privilege levels. By crafting a malicious HTML page designed to trigger these specific translation pathways, the attacker can bypass the expected security controls and access resources restricted by origin policies.
The operational impact of this vulnerability is significant due to its potential for escalating privileges within the browser sandbox. Although the initial entry point requires compromising the renderer process, which typically limits direct system-level damage, the ability to bypass site isolation fundamentally undermines the entire defense-in-depth strategy employed by Chromium-based browsers. This allows an attacker to potentially access cookies, local storage, or DOM content from other tabs or windows that are hosted on different origins. Such a breach can lead to session hijacking, credential theft, and unauthorized data exfiltration, effectively neutralizing the protections intended to isolate malicious web pages from legitimate user activities.
This flaw aligns with CWE-269, which describes Improper Privilege Management, as it involves an actor obtaining privileges or accessing resources without proper authorization. Furthermore, in the context of the MITRE ATT&CK framework for enterprise security, this behavior corresponds to techniques related to Defense Evasion and Credential Access, specifically those involving browser-based attacks that bypass isolation mechanisms. The exploitation path typically falls under T1059, Command and Scripting Interpreter, when considering how the crafted HTML page executes malicious logic within the renderer context.
Mitigation for this vulnerability primarily involves updating Google Chrome to version 155.0.8059.39 or later, where these authorization checks have been reinforced. For organizations managing large fleets of devices, ensuring automatic update policies are enforced is critical to closing this window of exposure. Additionally, security teams should monitor for indicators of compromise that suggest renderer process exploitation attempts, such as unusual network traffic patterns originating from browser processes or unexpected access logs related to translation services. Implementing strict Content Security Policies and disabling unnecessary browser features can also reduce the attack surface available to potential adversaries seeking to exploit similar architectural weaknesses in future updates.