CVE-2026-113117 in Chrome
Summary
by MITRE • 10/21/2026
Improper input validation in ANGLE in Google Chrome on on Mac 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: High)
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Analysis
by VulDB Data Team • 10/21/2026
The vulnerability identified within the ANGLE graphics library component of Google Chrome on macOS represents a critical failure in input validation mechanisms that governs how graphical data is processed prior to execution. ANGLE, which serves as an implementation of OpenGL ES for web browsers by translating WebGL calls into native platform APIs such as Metal or Vulkan, acts as a crucial intermediary between the browser's rendering engine and the underlying operating system graphics subsystem. When this component fails to properly sanitize or validate inputs received from untrusted sources, it creates a pathway for malicious actors to inject crafted data that exploits internal logic errors within the renderer process. This specific flaw was present in versions of Google Chrome prior to 156.0.8078.47 and is classified with a High security severity by the Chromium project due to its potential impact on system integrity and user privacy.
From a technical perspective, improper input validation typically involves insufficient checks on data types, lengths, or structural constraints before they are passed to lower-level functions that perform memory operations or execute code paths within the sandboxed renderer process. In the context of ANGLE, this could manifest as an out-of-bounds write, a use-after-free condition, or integer overflow resulting from malformed shader programs, texture data, or WebGL API calls embedded in a malicious HTML page. By crafting a webpage that triggers these specific validation failures, a remote attacker can manipulate the state of the graphics pipeline to achieve arbitrary code execution within the confined environment of the browser sandbox. Although modern browsers employ robust sandboxing techniques designed to limit the impact of such exploits by restricting access to sensitive system resources, successful exploitation allows an attacker to bypass certain isolation boundaries and execute commands with the privileges granted to the Chrome process.
The operational impact of this vulnerability is significant because it enables remote code execution without requiring any user interaction beyond visiting a maliciously constructed website or having content loaded via cross-site scripting vectors that target vulnerable browser versions. An attacker could leverage this capability to install malware, exfiltrate sensitive data stored within the browser profile such as cookies and saved passwords, or use the compromised machine as part of a larger botnet infrastructure. The fact that the exploit targets the Mac platform specifically highlights potential platform-specific implementation details in ANGLE's translation layers for Metal or other macOS graphics APIs where memory management and pointer arithmetic are handled differently than on Windows or Linux systems. This underscores the importance of rigorous testing across all supported operating systems to ensure consistent security postures regardless of the underlying hardware architecture.
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. The Chromium project has addressed these input validation flaws by implementing stricter boundary checks and enhancing the robustness of data parsing routines within ANGLE. Beyond immediate patching, defense-in-depth strategies should be employed including enabling automatic updates to prevent exposure windows, utilizing browser hardening extensions that restrict script execution on untrusted domains, and maintaining up-to-date operating system patches which may include additional kernel-level protections against sandbox escapes. Monitoring for anomalous network activity or unexpected process behavior can also aid in detecting potential exploitation attempts before significant damage occurs.
This vulnerability aligns with Common Weakness Enumeration (CWE) category CWE-20 Improper Input Validation, which describes the failure to verify that input data meets expected criteria such as type, length, range, and syntax before processing. Furthermore, it relates to ATT&CK technique T1059 Command and Scripting Interpreter where attackers utilize system utilities or scripts to execute commands within a compromised environment. The exploitation path described corresponds to initial access vectors involving spearphishing links or drive-by downloads that deliver the crafted HTML payload. Understanding these mappings helps security teams prioritize remediation efforts based on standardized frameworks while ensuring comprehensive coverage of both technical fixes and procedural controls necessary to defend against sophisticated web-based attacks targeting browser rendering engines.