CVE-2026-95365 in Chrome
Summary
by MITRE • 09/29/2026
Type confusion in IndexedDB in Google Chrome prior to 154.0.8037.57 allowed a remote attacker to potentially 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 involves a type confusion flaw within the IndexedDB implementation of Google Chrome prior to version 154.0.8037.57. Type confusion is a critical class of memory corruption vulnerabilities where an object or variable is treated as one data type when it should be another, leading to undefined behavior and potentially exploitable conditions. In this specific instance, the flaw resides in how Chrome handles objects within its IndexedDB subsystem, which is responsible for storing structured client-side data. When a remote attacker crafts a malicious HTML page that interacts with IndexedDB in a precise manner, they can trigger a state where internal pointers or memory structures are misinterpreted due to incorrect type assumptions by the browser engine. This discrepancy allows an attacker to manipulate how data is read from or written to memory, bypassing standard safety checks designed to prevent unauthorized access or execution of arbitrary code.
From a technical perspective, this vulnerability falls under CWE-843, which refers to Access of Incorrect Type, and often leads to CWE-120, Buffer Overflow, or more specifically in modern managed environments like Chrome's V8 engine, it can result in out-of-bounds reads or writes if the type mismatch causes incorrect size calculations or pointer arithmetic. The Chromium security team has classified this issue with a High severity rating, indicating that while exploitation may require specific conditions such as user interaction via a crafted webpage, the potential impact is significant. The attack vector involves a remote attacker hosting malicious content on a web server and enticing a victim to visit it. Once loaded, the script within the HTML page exploits the type confusion in IndexedDB operations to corrupt memory structures, potentially achieving arbitrary code execution within the browser's sandboxed environment.
The operational impact of this vulnerability is severe because successful exploitation allows an attacker to execute arbitrary commands with the privileges of the user running the browser. Although Chrome employs a multi-process architecture and sandboxes each tab to limit the blast radius of such exploits, breaking out of the renderer process into higher-privilege processes or accessing sensitive local data remains a primary goal for attackers using this technique. This could lead to full system compromise if combined with other vulnerabilities or if the sandbox boundaries are weakened by specific configurations or extensions. The ability to execute arbitrary code means an attacker can install malware, steal cookies and session tokens, perform keylogging, or pivot further into internal networks depending on the victim's environment.
Mitigation for this vulnerability primarily involves updating Google Chrome to version 154.0.8037.57 or later, where the type confusion in IndexedDB has been addressed through code fixes that enforce stricter type checking and memory safety during object handling. Users should ensure automatic updates are enabled to receive security patches promptly. For organizations managing multiple endpoints, deploying centralized patch management solutions is recommended to reduce exposure time. Additionally, users can mitigate risk by disabling JavaScript on untrusted sites or using browser extensions that restrict access to IndexedDB for suspicious domains, although these measures may impact usability and do not replace the need for software updates. Security teams should also monitor for indicators of compromise related to this specific CVE in their network traffic logs, as attackers often leverage newly disclosed vulnerabilities in targeted campaigns shortly after public disclosure.