CVE-2026-113248 in Chrome
Summary
by MITRE • 10/21/2026
Memory corruption in FileSystem in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Low)
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Analysis
by VulDB Data Team • 10/21/2026
The vulnerability identified as CVE-2023-XXXX, affecting Google Chrome prior to version 156.0.8078.47, represents a critical memory corruption flaw within the browser's FileSystem component. This defect arises from improper handling of data structures during file system operations, specifically when processing crafted HTML pages that trigger specific edge cases in how resources are allocated and managed in memory. The root cause is classified under CWE-120, Buffer Overflow, or potentially CWE-787, Out-of-bounds Write, depending on the precise nature of the corruption observed by security researchers. These types of vulnerabilities occur when a program writes data beyond the boundaries of a fixed-size buffer, leading to overwriting adjacent memory locations that may contain critical control structures such as return addresses, function pointers, or object headers.
From an operational perspective, this vulnerability allows for remote code execution with significant implications for user security. Although Chromium has classified the severity as Low, likely due to existing mitigations like sandboxing and heap hardening techniques that make exploitation difficult in practice, the theoretical risk remains high. A remote attacker can craft a malicious HTML page containing specific JavaScript payloads or embedded resources designed to trigger the memory corruption flaw. When an unsuspecting user visits this webpage, the browser processes the request through the FileSystem API, leading to the overflow condition. If successful, this allows the attacker to execute arbitrary code within the context of the renderer process sandbox. While the sandbox restricts access to sensitive system resources, achieving execution inside the sandbox is a critical step toward breaking out into the host operating system, potentially leading to full device compromise if combined with other vulnerabilities or exploitation techniques targeting sandbox escape mechanisms.
The attack vector aligns closely with ATT&CK technique T1059, Command and Scripting Interpreter, specifically through JavaScript interpretation within the browser environment. Furthermore, it relates to T1203, Exploitation for Client Execution, where the initial access is gained via a user interaction such as visiting a malicious site. The exploitation chain typically involves crafting a payload that leverages the memory corruption to gain arbitrary read and write primitives, which are then used to bypass security features like Control Flow Integrity (CFI) or Data Execution Prevention (DEP). This process often requires precise heap grooming techniques to place specific objects in predictable memory locations, increasing the complexity of exploitation but not eliminating the threat entirely.
Mitigation strategies primarily involve updating Google Chrome to version 156.0.8078.47 or later, where these memory management issues have been addressed by developers through rigorous code reviews and automated fuzzing tests. For organizations managing large fleets of endpoints, enforcing automatic browser updates is essential to ensure that all users are protected against such remote exploitation attempts. Additionally, deploying endpoint detection and response (EDR) solutions with behavioral analysis capabilities can help detect anomalous processes spawned from the Chrome renderer process, providing an additional layer of defense in depth. Users should also be educated on the risks of visiting untrusted websites and disabling unnecessary browser features or plugins that expand the attack surface, although modern browsers have largely deprecated such legacy components to reduce exposure to these types of vulnerabilities.