CVE-2026-113326 in Chrome
Summary
by MITRE • 10/21/2026
Memory corruption in Core in Google Chrome on on Windows prior to 156.0.8078.47 allowed a remote attacker to potentially read memory inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 10/21/2026
The vulnerability identified involves a critical memory corruption flaw within the Core component of Google Chrome, specifically affecting versions running on Windows prior to build 156.0.8078.47. This defect represents a significant breach in the browser's security architecture, as it allows for unauthorized access to protected memory regions that are typically isolated from untrusted web content. The issue stems from improper handling of data structures within the core rendering engine or process management subsystems, leading to conditions where heap corruption or use-after-free scenarios can be triggered by maliciously crafted input. Such flaws are particularly dangerous because they undermine the fundamental isolation principles that prevent a compromised webpage from escalating privileges or accessing sensitive information stored in other browser processes.
From a technical perspective, memory corruption vulnerabilities like this one often arise when the application fails to properly validate bounds during array access operations or mishandles pointer arithmetic after an object has been deallocated. In the context of Chrome's multi-process architecture, the renderer process is sandboxed to limit its ability to interact with the operating system and other processes. However, if a vulnerability exists in the core components that bridge these boundaries or manage internal memory allocation incorrectly, an attacker can exploit this weakness to write arbitrary data into protected memory spaces. This capability effectively neutralizes the sandbox's protective barriers, allowing code execution within higher-privilege contexts or enabling information disclosure by reading sensitive data such as cookies, session tokens, or credentials stored in memory.
The operational impact of this vulnerability is severe due to its potential for remote exploitation via a crafted HTML page. An attacker does not need physical access or user interaction beyond visiting a malicious website hosted on a server under their control. By embedding specific exploit code within the HTML structure, potentially utilizing JavaScript and WebGL features common in modern web applications, the attacker can trigger the memory corruption flaw automatically upon page load. This leads to potential remote code execution or arbitrary read operations inside the sandboxed environment. The severity rating of Medium by Chromium indicates that while exploitation may require certain conditions or specific browser configurations, the ease of delivery through standard web technologies makes it a high-risk threat for end-users who browse untrusted sites regularly.
This vulnerability aligns with Common Weakness Enumeration category CWE-125, which describes Out-of-Bounds Read, and potentially CWE-416, Use After Free, depending on the specific mechanism triggering the memory corruption. In terms of offensive security frameworks such as MITRE ATT&CK, this flaw facilitates techniques related to Initial Access through spearphishing links or drive-by downloads, specifically leveraging browser vulnerabilities for code execution. It also touches upon Defense Evasion by bypassing sandbox restrictions and Credential Access if sensitive data is exfiltrated from memory. The ability to read inside the sandbox directly compromises the confidentiality of user data processed within the browser environment, posing a direct threat to privacy and security integrity.
Mitigation strategies primarily involve immediate patching to version 156.0.8078.47 or later, where these specific memory management issues have been addressed by Google's engineering team through rigorous code review and fuzz testing. Organizations should enforce automatic update policies for Chrome installations across all endpoints to ensure that users are protected against known exploits. Additionally, deploying endpoint detection and response solutions with behavioral analysis capabilities can help identify anomalous processes attempting to access restricted memory regions or exhibiting patterns consistent with browser exploit kits. Security awareness training remains relevant as well, encouraging users to avoid visiting untrusted websites and to monitor for unusual system behavior following visits to suspicious domains.