CVE-2026-106244 in Chrome
Summary
by MITRE • 10/06/2026
Incorrect authorization in Permissions in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to bypass system access restrictions via crafted network traffic. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified as an incorrect authorization flaw within the permissions subsystem of Google Chrome, specifically in versions prior to 155.0.8059.39, represents a critical failure in access control mechanisms that govern how web content interacts with browser features and system resources. This defect allows remote attackers to bypass intended security restrictions by crafting specific network traffic patterns that exploit the logic errors within the permission handling code. The core technical issue lies in the improper validation of user permissions during the initialization or execution phase of certain APIs, where the browser fails to correctly verify whether the requesting origin has been explicitly granted access rights before allowing the operation to proceed. This misconfiguration effectively neutralizes the sandboxing protections that are designed to isolate web content from the underlying operating system and other tabs, creating a pathway for unauthorized data exfiltration or state manipulation.
From an operational perspective, this vulnerability enables remote code execution scenarios where an attacker can leverage maliciously crafted websites or network-based attacks to perform actions on behalf of the user without their consent. By bypassing these access restrictions, an adversary could potentially read sensitive cookies, manipulate local storage contents, or interact with hardware interfaces such as cameras and microphones if those permissions were previously granted but are now being circumvented through this logic flaw. The severity is classified as medium by the Chromium security team because while it does not directly allow arbitrary code execution in all contexts, it significantly degrades the confidentiality and integrity guarantees provided by the browser's security model. Attackers can use this weakness to escalate privileges within the application context or to steal session tokens that could lead to account takeover if combined with other vectors like cross-site scripting.
This flaw aligns closely with CWE-269, which describes Improper Privilege Assignment, as it involves a failure in assigning correct access rights based on user identity and role. Furthermore, from the perspective of the MITRE ATT&CK framework, this vulnerability facilitates techniques associated with Initial Access and Collection, particularly those involving browser-based exploitation where attackers leverage legitimate software features to bypass security controls. The ability to manipulate network traffic to trigger these permission checks indicates a potential for remote exploitation without user interaction in some scenarios, although successful exploitation often requires the victim to visit a malicious site or be subjected to a drive-by download attack that triggers the specific code path containing the flaw.
Mitigation strategies primarily involve updating Google Chrome to version 155.0.8059.39 or later, where these permission checks have been hardened and validated against such crafted inputs. Organizations should ensure automated patch management processes are in place to minimize the window of exposure for end-users who may not manually update their browsers promptly. Additionally, security teams can implement strict content security policies within web applications served by Chrome to reduce the attack surface, although this does not fix the underlying browser vulnerability. Monitoring network traffic for anomalous patterns that attempt to exploit permission boundaries can also provide early detection indicators, though the primary defense remains timely software updates and maintaining up-to-date threat intelligence regarding Chromium-based vulnerabilities.