CVE-2026-113297 in Chrome
Summary
by MITRE • 10/21/2026
Improper access control in Ozone in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to leak sensitive information 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 improper access control issue within the Apache Ozone component, specifically affecting versions of Google Chrome prior to 156.0.8078.47, represents a significant breach in the browser's isolation mechanisms. This flaw arises from insufficient validation or enforcement of permissions when handling resources associated with Ozone, which is an API allowing web applications to access native operating system features such as file systems and printers. In this context, the security severity is classified as Medium by Chromium standards, indicating that while exploitation requires specific conditions, it poses a tangible risk to user data integrity and privacy. The core technical flaw lies in the failure of the browser's sandboxing architecture to properly restrict access privileges for web content interacting with these native APIs. When a malicious actor crafts an HTML page designed to exploit this misconfiguration, they can bypass expected security boundaries that are meant to prevent untrusted code from accessing sensitive system resources or user data without explicit consent and proper authorization checks.
From a technical perspective, the vulnerability exploits weaknesses in how Chrome handles cross-origin requests or API calls related to Ozone. Normally, modern browsers enforce strict same-origin policies and require users to grant specific permissions for web pages to access local files or hardware devices. However, due to this improper access control, an attacker can construct a malicious webpage that tricks the browser into executing actions or retrieving data it should otherwise deny. This could involve reading sensitive configuration files, accessing user documents stored locally, or potentially exfiltrating session cookies and other authentication tokens if they are accessible through the compromised interface. The exploitation vector is remote, meaning no physical access to the victim's machine is required; instead, the attacker simply needs to lure a user into visiting the crafted HTML page, often via phishing campaigns, malicious advertisements, or drive-by downloads on compromised websites.
The operational impact of this vulnerability centers on information disclosure and potential privilege escalation within the browser environment. By leaking sensitive information, an attacker gains insight into the victim's digital footprint, which can be leveraged for further attacks such as identity theft, account takeover, or targeted social engineering. The ability to read local files without proper authorization undermines the fundamental trust model of web browsing, where users expect that visiting a website does not result in unauthorized access to their personal data. This erosion of trust is particularly dangerous because it occurs silently and automatically upon page load, leaving little opportunity for user intervention unless they are actively monitoring network traffic or system activity. The medium severity rating reflects the balance between the ease of exploitation and the potential damage; while it may not allow full remote code execution on its own, the data leakage can serve as a critical stepping stone in more complex attack chains.
To mitigate this risk, users must ensure that their Google Chrome installation is updated to version 156.0.8078.47 or later, where these access control checks have been hardened and validated by the Chromium security team. Administrators should implement automated patch management strategies to minimize the window of exposure for all endpoints within an organization. Additionally, users can reduce their attack surface by disabling unnecessary browser features such as Ozone if they do not require web applications to interact with native system resources. Enabling strict content security policies and utilizing extensions that block unauthorized API calls or restrict file access permissions can provide additional layers of defense. It is also advisable for organizations to conduct regular vulnerability assessments and penetration testing focused on web application interactions with local systems to identify similar misconfigurations before they are exploited in the wild.
This incident aligns with CWE-269, which describes Improper Privilege Management, specifically where a principal operates outside of its intended privileges. It also relates to ATT&CK technique T1059, Command and Scripting Interpreter, if the leaked information is used to facilitate further scripting actions on the host system. Furthermore, it falls under the broader category of CWE-200, Information Exposure, as the primary outcome is the unauthorized disclosure of sensitive data. Understanding these classifications helps security teams map this vulnerability to existing defense frameworks and prioritize remediation efforts based on standardized risk metrics rather than ad-hoc assessments. Continuous monitoring for similar patterns in browser updates and third-party extensions remains essential to maintaining a robust security posture against evolving web-based threats that target application layer vulnerabilities.