CVE-2026-17996
Summary
by MITRE • 07/30/2026
Inappropriate implementation in Browser in Google Chrome on Mac prior to 151.0.7922.72 allowed a local attacker to bypass navigation restrictions via a malicious file. (Chromium security severity: Low)
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Analysis
by VulDB Data Team • 07/30/2026
This vulnerability represents a navigation restriction bypass issue within the macOS version of Google Chrome browser prior to version 151.0.7922.72. The flaw stems from an improper implementation in the browser's handling of file-based navigation attempts, specifically affecting the security controls that should prevent unauthorized access to restricted content or locations. The vulnerability allows a local attacker with access to the target system to craft malicious files that can circumvent the browser's intended navigation restrictions. This type of vulnerability falls under the category of improper access control implementation and could potentially enable attackers to gain access to content or functionality that should be restricted. The security impact is classified as low by Chromium standards, yet it represents a significant concern for systems where local privilege escalation or unauthorized access to sensitive browsing sessions might occur. The flaw specifically affects the macOS implementation of Chrome's security model, indicating that other platforms may not be affected by this particular vulnerability.
The technical exploitation of this vulnerability occurs through the manipulation of file-based navigation attempts within the browser environment. When a user interacts with malicious files on the local system, the browser's navigation restriction mechanisms fail to properly validate or enforce access controls, allowing the attacker to bypass intended security boundaries. This could potentially enable attackers to access restricted web resources, navigate to unauthorized locations, or gain access to content that should be protected by the browser's security policies. The vulnerability demonstrates a failure in proper input validation and access control enforcement within the browser's file handling mechanisms. From a cybersecurity perspective, this issue aligns with common attack patterns described in the attack mitigation framework where local privilege escalation opportunities can lead to broader system compromise.
The operational impact of this vulnerability extends beyond simple navigation bypass capabilities and represents a potential vector for more sophisticated attacks. While classified as low severity, local attackers could leverage this vulnerability to establish persistent access or to perform reconnaissance activities within the browser environment. The risk is particularly elevated in environments where users may encounter malicious files through social engineering or other attack vectors, as the vulnerability can be triggered simply through normal browsing behavior involving file interactions. Organizations should consider this vulnerability as part of their broader security posture assessment, especially when evaluating local privilege escalation risks and user behavior patterns that might lead to exploitation. The vulnerability could potentially be combined with other local exploits to create more significant security breaches, making it important for system administrators to maintain current browser versions.
Mitigation strategies for this vulnerability center on immediate browser updates to version 151.0.7922.72 or later, which would contain the necessary patches to address the navigation restriction bypass issue. System administrators should implement automated update mechanisms to ensure all users maintain current browser versions, particularly in enterprise environments where multiple users may be exposed to similar risks. Additional protective measures include implementing user education programs focused on recognizing potentially malicious files and understanding safe browsing practices. Security monitoring should include detection of unusual file access patterns or navigation behaviors that might indicate exploitation attempts. Organizations should also consider implementing network-based controls such as web application firewalls or content filtering solutions to provide additional layers of protection against potential exploitation scenarios. The vulnerability highlights the importance of maintaining up-to-date browser security patches and demonstrates how seemingly low severity issues can represent significant risks in specific operational contexts.