CVE-2026-113095 in Chrome
Summary
by MITRE • 10/21/2026
Out of bounds read in Focus 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 out-of-bounds read within the Focus component of Google Chrome represents a critical memory safety flaw that was present in versions prior to 156.0.8078.47. This type of error typically arises when software reads data from a memory location beyond the intended buffer boundaries, often due to improper validation of array indices or pointer arithmetic. In the context of web browsers like Chrome, such vulnerabilities are particularly dangerous because they occur within highly complex rendering engines and JavaScript interpreters that process untrusted content from remote websites. The specific mention of Focus suggests an issue related to how the browser manages focus states for UI elements or input fields, where a crafted HTML page could trigger incorrect memory access patterns during state transitions or event handling processes.
From a technical perspective, out-of-bounds reads are classified under CWE-125 in the Common Weakness Enumeration standard, which describes situations where software reads data past the end of a buffer. While traditionally considered less severe than write vulnerabilities because they do not directly allow arbitrary code execution by overwriting memory, modern exploitation techniques have evolved to leverage these flaws for significant impact. An attacker can craft an HTML page that triggers this out-of-bounds read in conjunction with other browser features or heap manipulation techniques to achieve information disclosure or, more critically, to facilitate further exploitation steps leading to remote code execution. The Chromium security team has rated this issue as High severity, indicating a substantial risk to user safety and system integrity when interacting with maliciously constructed web content.
The operational impact of this vulnerability is severe due to the sandboxing architecture employed by Google Chrome. Although browsers utilize sandboxes to restrict the privileges of renderer processes, sophisticated attackers can exploit memory corruption vulnerabilities like out-of-bounds reads to escape these restrictions. By carefully crafting a payload that triggers the flaw and potentially leaks sensitive data from adjacent memory regions, an attacker may be able to construct a proof-of-concept for arbitrary code execution within the sandboxed environment. Once inside the sandbox, further exploitation techniques can often lead to breaking out of the browser's security boundaries entirely, allowing the remote attacker to execute arbitrary commands on the victim's operating system with the privileges of the current user. This aligns with ATT&CK technique T1203, which covers Exploitation for Client Execution, where attackers use vulnerabilities in client software to gain initial access and establish a foothold on the target machine.
Mitigation strategies primarily involve updating Google Chrome to version 156.0.8078.47 or later, as this release contains patches that address the memory safety issues within the Focus component. Users should ensure automatic updates are enabled to receive security fixes promptly without manual intervention. For organizations managing multiple endpoints, deploying centralized patch management solutions can help enforce timely updates across all Chrome installations. Additionally, while no technical workaround exists for end-users beyond updating software, employing browser hardening techniques such as disabling JavaScript in untrusted sites or using extensions that restrict certain web behaviors can reduce the attack surface. Security teams should also monitor for indicators of compromise related to this vulnerability and educate users about the risks of visiting suspicious websites containing crafted HTML content designed to exploit known browser flaws.