CVE-2026-106229 in Chrome
Summary
by MITRE • 10/06/2026
UI misrepresentation in FileSystem in Google Chrome 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: Medium)
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Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified as UI misrepresentation within the file system handling components of Google Chrome prior to version 155.0.8059.39 represents a significant trust boundary violation that exploits the user interface layer rather than underlying code execution flaws in the browser engine itself. This flaw allows for deceptive rendering of file paths or directory structures, creating a discrepancy between what is displayed to the end-user and the actual system state being accessed by the application. By manipulating how local resources are presented during interactions such as drag-and-drop operations or file selection dialogs, an attacker can obscure the true location of files on the victim's machine. This technique falls under the category of UI redressing attacks where visual cues are manipulated to mislead users into performing actions they would not otherwise consent to if fully informed of the context.
From a technical perspective, this vulnerability leverages social engineering tactics by crafting HTML pages that trigger specific file system APIs in ways that exploit ambiguities in path resolution or display logic. When a user interacts with these crafted elements, the browser may present a sanitized or misleading representation of the target resource while simultaneously executing operations against a different, potentially sensitive location on the local filesystem. This discrepancy enables remote attackers to bypass intended access restrictions because the security model relies heavily on user confirmation and visual feedback during file access events. If the interface fails to accurately reflect the actual path being accessed, users may inadvertently grant permissions or allow data exfiltration from directories they believe are safe or unrelated to their current task.
The operational impact of this vulnerability is primarily centered around unauthorized data access and potential privacy breaches rather than direct system compromise through code execution. An attacker leveraging this flaw can trick a user into exposing sensitive files, such as documents containing personal identifiable information, financial records, or proprietary corporate data. The severity is classified as medium because while it does not allow for arbitrary remote code execution, the ability to bypass access controls via deception poses a substantial risk in enterprise environments where employees frequently interact with external web content and local file systems. Successful exploitation requires user interaction, making social engineering a critical component of the attack chain, but once triggered, the consequences can include significant data leakage without any technical indicators of compromise within the browser's execution environment.
Mitigation strategies for this vulnerability involve both immediate patching and long-term security hygiene practices. The primary remediation is to update Google Chrome to version 155.0.8059.39 or later, where these UI rendering inconsistencies have been addressed by developers in Chromium. Organizations should enforce automated browser update policies to ensure all endpoints are protected against known interface-level flaws. Additionally, users can be educated on verifying file paths before confirming access requests and avoiding interactions with untrusted web pages that request local resource permissions. Implementing strict content security policies and restricting the scope of file system APIs available to web applications further reduces the attack surface by limiting what a compromised or malicious page can actually do even if it attempts to exploit UI ambiguities.
This incident aligns with CWE-20, Improper Input Validation, specifically regarding how input from untrusted sources is processed when determining which resources to expose in the user interface. It also maps closely to MITRE ATT&CK technique T1534, Internal Spearphishing, and more broadly to social engineering tactics that manipulate human perception rather than software logic directly. Security teams should monitor for similar patterns where UI elements do not accurately reflect backend operations, as these discrepancies often serve as precursors to more severe data exfiltration events in modern web-based attack vectors.