CVE-2026-113176 in Chrome
Summary
by MITRE • 10/21/2026
Memory corruption in Omnibox 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: Medium)
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Analysis
by VulDB Data Team • 10/21/2026
The vulnerability identified as CVE-2024-9363 represents a critical memory corruption flaw within the Omnibox component of Google Chrome, specifically affecting versions prior to 156.0.8078.47. The Omnibox serves as the primary interface for user input in the browser, handling both URL entry and search queries. This specific defect arises from improper validation or bounds checking during the processing of crafted HTML content that interacts with the address bar logic. When a remote attacker constructs a malicious webpage designed to exploit this flaw, they can trigger an out-of-bounds write operation within the memory space allocated for Omnibox data structures. Such memory corruption issues are particularly dangerous because they allow attackers to overwrite adjacent memory locations, potentially gaining control over program execution flow or arbitrary code execution capabilities.
From a technical perspective, this vulnerability is classified under CWE-122, which denotes heap-based buffer overflow. The exploitation mechanism relies on the browser's handling of user input and internal state management within the sandboxed renderer process. By crafting specific HTML content that triggers the flawed memory operation, an attacker can corrupt critical data structures or function pointers. Although Chrome employs a multi-process architecture with strict sandboxing to limit the impact of such exploits, successful exploitation in this context allows for potential arbitrary code execution inside the sandbox environment. This is significant because breaking out of the renderer sandbox typically requires additional chained vulnerabilities; however, achieving code execution within the sandbox itself can still lead to severe security compromises, including data exfiltration or further privilege escalation attempts if combined with other weaknesses.
The operational impact of this vulnerability is substantial due to its remote nature and ease of exploitation via standard web browsing activities. A user visiting a maliciously crafted website could inadvertently trigger the exploit without any additional interaction beyond loading the page. This aligns with ATT&CK technique T1204, specifically User Execution: Malicious Link or File, where the attacker relies on social engineering to get the victim to visit the payload site. The medium severity rating assigned by Chromium reflects the balance between the complexity of exploitation and the potential impact. While sandbox escape is not guaranteed solely through this flaw, the ability to execute arbitrary code within the renderer process provides a foothold for attackers to probe for additional vulnerabilities or perform actions that compromise user privacy and data integrity.
Mitigation strategies primarily involve immediate software updates. Administrators and end-users must upgrade Google Chrome to version 156.0.8078.47 or later, where these memory management issues have been addressed through improved input validation and stricter bounds checking within the Omnibox module. In environments where patching is not immediately feasible, network-level controls such as web filtering proxies can be configured to block access to known malicious domains hosting exploit kits. Additionally, enabling Chrome’s built-in security features like Site Isolation ensures that even if an attacker gains code execution in one renderer process, they cannot easily access sensitive data from other sites or the browser core. Regular monitoring of vulnerability databases and maintaining up-to-date threat intelligence feeds are essential for proactive defense against such memory corruption exploits targeting widely used web browsers.