CVE-2026-106296 in Chrome
Summary
by MITRE • 10/06/2026
Improper privilege management in UI in Google Chrome on on Mac prior to 155.0.8059.39 allowed a remote attacker leveraging social engineering to bypass system access restrictions via a crafted HTML page. (Chromium security severity: Low)
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Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified as an improper privilege management issue within the user interface of Google Chrome on macOS, specifically in versions prior to 155.0.8059.39, represents a significant risk related to how browser interactions with operating system-level permissions are handled. This flaw allows for the bypassing of system access restrictions through social engineering tactics rather than direct technical exploitation of code logic alone. The core issue lies in the UI's failure to properly validate or restrict user actions that could lead to elevated privileges or unauthorized access states, creating a gap between intended security policies and actual runtime behavior.
From a technical perspective, this vulnerability falls under the category of CWE-269, which denotes Improper Privilege Management. The attacker leverages social engineering by crafting an HTML page designed to trick the user into performing actions that inadvertently grant higher levels of access or bypass existing restrictions. This approach exploits human psychology rather than software bugs in isolation, making it a hybrid threat vector where technical flaws are amplified by deceptive design patterns such as fake permission dialogs or misleading interface elements that mimic legitimate system prompts.
The operational impact of this vulnerability is primarily centered around unauthorized data access and potential compromise of user privacy on macOS systems. By bypassing system access restrictions, an attacker could potentially gain visibility into sensitive files, clipboard contents, or other protected resources depending on the specific privileges involved in the UI interaction. Although classified as low severity by Chromium security standards due to the reliance on social engineering for successful exploitation, the risk remains substantial because users may unknowingly consent to actions that compromise their system's integrity under false pretenses presented within the browser environment.
Mitigation strategies must focus on both technical updates and user education. The primary remediation is upgrading Google Chrome to version 155.0.8059.39 or later, where these privilege management checks in the UI have been corrected to ensure that access requests are properly validated against system policies before execution. Additionally, organizations should implement strict content security policies and browser hardening configurations to limit the capabilities of web pages running within the environment. User awareness training is equally critical, emphasizing caution when interacting with permission dialogs or unexpected prompts from websites, as these vulnerabilities rely heavily on user interaction for successful exploitation.
This incident aligns with ATT&CK technique T1059, Command and Scripting Interpreter, specifically in contexts where web-based scripts are used to trigger system-level actions through browser interfaces. It also relates to MITRE CWE-284, Improper Access Control, highlighting the need for robust validation mechanisms at every layer of interaction between web content and host operating systems. Continuous monitoring for unusual privilege escalation attempts and keeping software up-to-date remain essential practices in defending against such socially engineered attacks that exploit trust relationships within browser ecosystems.