CVE-2026-106293 in Chrome
Summary
by MITRE • 10/06/2026
Type confusion in ANGLE 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: High)
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Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified as a type confusion issue within ANGLE, the graphics abstraction layer utilized by Google Chrome prior to version 155.0.8059.39, represents a critical failure in memory safety and object integrity checks. Type confusion vulnerabilities occur when an application incorrectly assumes that a variable or data structure is of one specific type while it actually holds another, leading to improper handling of the underlying binary data. In this context, ANGLE translates high-level graphics commands into native OpenGL calls for execution on various hardware platforms. When the renderer process processes a crafted HTML page containing maliciously constructed WebGL content, the internal logic fails to validate that an object pointer or memory buffer matches its expected type definition before performing operations upon it. This misalignment allows an attacker who has already achieved code execution within the compromised renderer sandbox to manipulate how ANGLE interprets specific data structures, effectively bypassing the intended boundaries of the graphics subsystem.
The operational impact of this flaw is severe because it facilitates a privilege escalation from the restricted renderer process environment to arbitrary code execution outside the browser's security sandbox. The Chromium project classifies this issue with a High severity rating due to its potential for remote exploitation via standard web technologies. An attacker can craft an HTML page that, when rendered by Chrome, triggers the type confusion error during graphics processing. By carefully controlling the memory layout and object types involved in the ANGLE translation process, the malicious payload can overwrite critical function pointers or data structures located in higher-privileged memory regions. This mechanism allows the execution of arbitrary code with elevated privileges, effectively breaking out of the sandbox isolation that protects user data and system integrity from untrusted web content.
From a threat modeling perspective, this vulnerability aligns closely with CWE-843, which defines access to incorrect type during conversion, and is frequently associated with memory corruption exploits such as buffer overflows or use-after-free conditions if not properly mitigated by the compiler's security features like ASan or UAF protections. In terms of adversary tactics, this exploit path corresponds to ATT&CK technique T1059, Command and Scripting Interpreter, specifically within the context of sandbox escape techniques where an attacker leverages a local application vulnerability to gain broader system access. The exploitation chain typically involves initial delivery through a malicious webpage, followed by renderer process compromise via another vector or bug, and finally leveraging this type confusion in ANGLE to achieve arbitrary code execution with higher privileges.
Mitigation for this issue primarily relies on the deployment of Google Chrome version 155.0.8059.39 or later, which contains patches addressing the validation logic within the ANGLE graphics layer. Security administrators should ensure that all client systems are updated to prevent exploitation by remote attackers. Additionally, defense-in-depth strategies such as enabling hardware-based sandboxing features like Site Isolation and ensuring that operating system-level protections including DEP (Data Execution Prevention) and ASLR (Address Space Layout Randomization) are active can significantly reduce the likelihood of successful code execution even if a type confusion vulnerability is triggered. Continuous monitoring for anomalous behavior in graphics processing units and regular auditing of browser configurations remain essential practices to maintain robust security posture against such sophisticated web-based attacks.