CVE-2026-95286 in Chrome
Summary
by MITRE • 09/29/2026
Type confusion in Bindings in Google Chrome prior to 154.0.8037.57 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 09/29/2026
The vulnerability described constitutes a critical type confusion flaw within the JavaScript bindings layer of Google Chrome, specifically affecting versions prior to 154.0.8037.57. This class of defect arises when the browser's engine incorrectly handles data types during internal operations, leading to a state where an object is treated as having one type while it actually possesses another incompatible type in memory. In the context of Chrome’s V8 JavaScript engine and its associated bindings, this misalignment allows for improper access or manipulation of memory structures that are not intended to be accessible by standard script execution contexts. The severity is classified as high because such errors often bypass fundamental security boundaries established within the browser's architecture, creating a pathway for arbitrary code execution with potentially elevated privileges relative to the initial attack surface.
From a technical perspective, type confusion vulnerabilities typically occur when an application fails to properly validate or cast data types before performing operations on them. In Chrome’s case, this likely involves the interaction between JavaScript objects and native C++ components via bindings like V8's API. When a crafted HTML page triggers specific sequences of function calls or property accesses, it can force the engine into a state where memory pointers are misinterpreted. For instance, an attacker might craft a scenario where a pointer intended for one object type is dereferenced as another, allowing read-write access to arbitrary memory locations. This capability effectively neutralizes stack-based protections and heap hardening measures that rely on correct type assumptions, thereby enabling the execution of shellcode or other malicious payloads within the browser process context.
The operational impact of this vulnerability is severe due to its potential for remote code execution via a simple web page visit. An attacker does not need physical access or user interaction beyond loading a malicious URL, which can be delivered through phishing campaigns, drive-by downloads, or compromised advertising networks. Once executed inside the sandbox, the malware gains control over the browser process, allowing it to exfiltrate sensitive data such as cookies, session tokens, and saved passwords. Furthermore, depending on the specific implementation details of the exploit chain, this initial foothold could potentially be leveraged for sandbox escape techniques, granting access to the underlying operating system. This transforms a client-side web vulnerability into a full-system compromise vector, significantly increasing the risk profile for enterprise environments and individual users alike.
In terms of industry standards classification, this flaw aligns with CWE-843, which refers to Accessing Memory Location using Incorrect Reference Type. It also maps closely to MITRE ATT&CK technique T1059, specifically Command and Scripting Interpreter subcategories like JavaScript or ECMAScript, as the attack vector relies on executing malicious scripts within a browser environment. The exploitation of type confusion is a common theme in modern zero-day exploits targeting complex software systems with extensive binding layers between high-level languages and low-level system resources.
Mitigation strategies primarily involve immediate patching to version 154.0.8037.57 or later, where the underlying memory management logic has been corrected to enforce strict type checking during bindings operations. Security teams should ensure that automatic update mechanisms are enabled for all Chrome installations within their infrastructure to minimize exposure windows. Additionally, deploying browser isolation technologies or sandboxing solutions can provide an additional layer of defense by limiting the impact if a vulnerability is successfully exploited. Network-level controls such as web filtering and content security policies may also help mitigate initial access vectors by blocking known malicious domains hosting exploit kits associated with this specific flaw.