CVE-2026-113006 in Chrome
Summary
by MITRE • 10/21/2026
Out of bounds read in Navigation 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 an out-of-bounds read within the Navigation component of Google Chrome prior to version 156.0.8078.47 represents a critical memory safety flaw that undermines the browser's core security model. This issue stems from improper bounds checking during the processing of navigation requests, specifically when handling complex or malformed HTML structures crafted by an attacker. In modern web browsers, the rendering engine and JavaScript execution environment operate within isolated sandboxed processes to limit the impact of any potential exploitation. However, memory corruption vulnerabilities such as out-of-bounds reads can sometimes be leveraged to achieve arbitrary code execution if they lead to information disclosure that aids in bypassing other security mitigations or if the specific implementation allows for subsequent heap manipulation techniques like use-after-free scenarios triggered by the initial read error.
From a technical perspective, an out-of-bounds read occurs when software attempts to access memory locations outside the intended buffer boundaries. While this type of vulnerability is often classified as less severe than write vulnerabilities because it does not directly allow overwriting control flow data, it can still lead to significant security breaches. In the context of Chrome's navigation subsystem, accessing invalid memory may expose sensitive internal state information or pointers that an attacker can use to construct a more complex exploit chain. The Chromium project has classified this issue with a medium severity rating, reflecting its potential for exploitation under specific conditions but acknowledging that it requires precise crafting and potentially multiple stages to achieve full code execution within the sandboxed environment.
The operational impact of this vulnerability is substantial because it allows a remote attacker to execute arbitrary code inside the browser's sandbox through a simple interaction with a malicious web page. An attacker would need to host or lure a victim to visit a specially crafted HTML page that triggers the flawed navigation logic. Once triggered, the out-of-bounds read could facilitate further exploitation steps such as heap spraying or information leakage, which are essential for bypassing modern browser defenses like Control Flow Integrity (CFI) and Data Execution Prevention (DEP). Successful exploitation would grant the attacker the ability to run malicious code with the privileges of the current user within the restricted sandbox context, potentially leading to data exfiltration, malware installation, or further lateral movement if additional vulnerabilities are present.
This vulnerability aligns with Common Weakness Enumeration CWE-125, which describes out-of-bounds read errors resulting from insufficient validation of array indices or pointer arithmetic. Furthermore, in terms of the MITRE ATT&CK framework, this flaw supports techniques associated with initial access and privilege escalation within confined environments, specifically relating to exploitation for defense evasion by bypassing sandbox restrictions. The attack vector is classified as remote via a web browser, emphasizing the need for users to keep their browsers updated and to exercise caution when visiting untrusted websites or clicking on suspicious links containing embedded HTML content.
Mitigation strategies primarily involve updating Google Chrome to version 156.0.8078.47 or later, where these bounds checking mechanisms have been corrected by the Chromium development team. Organizations should enforce automated patch management policies for all endpoints running this browser to ensure timely remediation of such vulnerabilities. Additionally, users can enhance their security posture by enabling site isolation features in Chrome, which further restricts how pages interact with each other and limits the blast radius of any successful exploitation attempt. Security teams should also monitor for indicators of compromise related to unusual network traffic or process behavior that might indicate an active exploit attempt targeting this specific navigation flaw before patches are applied.