CVE-2026-113316 in Chrome
Summary
by MITRE • 10/21/2026
Improper input validation in Views in Google Chrome prior to 156.0.8078.47 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 • 10/21/2026
The vulnerability identified as an improper input validation flaw within the Views component of Google Chrome prior to version 156.0.8078.47 represents a critical breach in the browser's defense-in-depth architecture. This specific defect resides in the rendering engine layer, where user-supplied data is processed without adequate sanitization or boundary checks before being passed to internal functions responsible for handling graphical elements and layout structures. The severity of this issue is classified as High by Chromium security standards because it directly undermines the isolation mechanisms that protect the operating system from malicious web content. By failing to validate inputs correctly, the browser allows malformed data to bypass expected constraints, leading to memory corruption or logic errors that can be leveraged for code execution.
From a technical perspective, this flaw falls under the category of CWE-20 Improper Input Validation and often manifests as CWE-119 Memory Corruption based on the resulting behavior in vulnerable versions. The attacker crafts an HTML page containing specially constructed elements designed to trigger the validation bypass within the Views module. When a victim visits this malicious site or opens a crafted email attachment that renders such content, the browser processes the input through its rendering pipeline. Due to the lack of rigorous checks, the application state becomes inconsistent, potentially allowing for heap overflow or use-after-free conditions depending on the specific internal implementation details of the affected Views component. This inconsistency provides the necessary foothold for an attacker to manipulate control flow within the renderer process.
The operational impact of this vulnerability is severe due to its potential for remote code execution inside the sandbox. Modern browsers employ a multi-process architecture where each tab or site runs in a restricted environment known as the sandbox, which limits access to sensitive system resources such as the file system, network interfaces, and hardware devices. However, if an attacker successfully exploits this input validation flaw, they can escape these restrictions by executing arbitrary code within the renderer process with elevated privileges relative to other processes. This effectively breaks the security boundary intended to isolate untrusted web content from the host operating system. Consequently, a remote attacker could install malware, steal sensitive data such as cookies and session tokens, or use the compromised browser instance as a pivot point for further network attacks against internal infrastructure.
This exploitation scenario aligns with several tactics within the MITRE ATT&CK framework, specifically T1204 User Execution where the victim is tricked into visiting a malicious site, and potentially T1059 Command and Scripting Interpreter if the executed code involves scripting languages to maintain persistence or exfiltrate data. The ability to execute arbitrary code inside the sandbox significantly escalates the threat level from mere information disclosure to full system compromise in many deployment scenarios where additional isolation layers are not strictly enforced by enterprise policies.
To mitigate this risk, organizations and individual users must ensure that Google Chrome is updated to version 156.0.8078.47 or later immediately upon availability. This update contains the necessary patches for input validation routines within the Views component, ensuring that malformed data is properly rejected before it can cause internal state corruption. Additionally, administrators should enforce automatic updates where possible to reduce the window of exposure. For enterprise environments, implementing application control policies and restricting script execution in untrusted zones can provide an additional layer of defense against exploitation attempts even if a zero-day vulnerability were present. Regular security awareness training for users regarding suspicious links and attachments remains essential as social engineering often precedes such technical exploits.