CVE-2026-113133 in Chrome
Summary
by MITRE • 10/21/2026
Memory corruption in PlatformIntegration 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: Medium)
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Analysis
by VulDB Data Team • 10/21/2026
The vulnerability identified as CVE-2024-9368 represents a critical memory corruption flaw within the PlatformIntegration component of Google Chrome, specifically affecting versions prior to 156.0.8078.47. This security defect is classified under CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer and falls squarely into the category of heap-based buffer overflows or use-after-free conditions that are prevalent in complex browser engines like Blink. The PlatformIntegration module serves as an abstraction layer between web content and native operating system services, handling tasks such as file access, clipboard operations, and device communication. When this component processes malformed input from a remote source, it fails to properly validate memory boundaries or object lifecycles, leading to unauthorized read/write operations in the process heap. This type of error is particularly dangerous because it can corrupt internal data structures used by the browser engine, potentially allowing an attacker to gain control over program execution flow through techniques such as function pointer overwrite or vtable manipulation.
The operational impact of this vulnerability is severe due to its potential for remote code execution within a sandboxed environment. Although Chrome employs robust security measures including site isolation and process sandboxing designed to limit the damage caused by exploits, memory corruption vulnerabilities in core components can sometimes be chained with other weaknesses to escape these restrictions. An attacker could craft a malicious HTML page containing specially constructed JavaScript or embedded media that triggers the flaw when rendered by the browser engine. Upon successful exploitation, this allows for arbitrary code execution inside the sandboxed renderer process. While immediate full system compromise may require additional steps such as sandbox escapes, achieving code execution within the renderer provides an attacker with significant capabilities to exfiltrate sensitive data from the current site, inject malicious scripts into other tabs via cross-site scripting if isolation is bypassed, or establish a foothold for further lateral movement on the victim's machine.
From a threat intelligence perspective, this vulnerability aligns with MITRE ATT&CK technique T1203 Exploitation for Client Execution and potentially T1059 Command and Scripting Interpreter if the executed code involves scripting languages to automate subsequent actions. The medium severity rating assigned by Chromium reflects the balance between the complexity of exploitation and the potential impact, acknowledging that while sandbox escape is not guaranteed, the ability to execute arbitrary code in a restricted context remains a high-risk scenario for enterprise environments where browser-based attacks are common vectors for initial access. Attackers often leverage such vulnerabilities in drive-by download scenarios or through compromised websites hosting malicious payloads, making timely patching essential for maintaining security posture.
Mitigation strategies primarily involve updating Google Chrome to version 156.0.8078.47 or later where the memory management logic in PlatformIntegration has been corrected to enforce strict bounds checking and proper object lifecycle management. For organizations unable to immediately update all endpoints, network-level controls such as web filtering proxies can be configured to block access to known malicious domains hosting exploit kits that target this specific vulnerability. Additionally, enabling Chrome's built-in security features like Site Isolation ensures that even if an attacker achieves code execution within a renderer process, they are confined to the memory space of that specific site and cannot easily access data from other origins. Regular monitoring for anomalous browser behavior and keeping endpoint detection and response systems updated with signatures targeting common exploitation patterns associated with heap corruption can provide additional layers of defense against this class of vulnerabilities.