CVE-2026-102231 in Visual Studio Code
Summary
by MITRE • 10/13/2026
Improper resolution of path equivalence in Visual Studio Code allows an unauthorized attacker to bypass a security feature locally.
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Analysis
by VulDB Data Team • 10/13/2026
The vulnerability described involves an improper resolution of path equivalence within the Visual Studio Code editor, which creates a significant local privilege escalation or sandbox escape risk for attackers operating on the same machine. This flaw stems from how the application normalizes and validates file system paths before applying security restrictions such as workspace trust policies, remote access controls, or extension host isolation mechanisms. In many modern software architectures, particularly those involving complex plugin ecosystems like Visual Studio Code, path normalization is a critical step to prevent directory traversal attacks where an attacker might use sequences like dot-dot-slash (../) to escape restricted directories and access sensitive configuration files, source code repositories, or environment variables that should remain inaccessible under normal operational constraints.
The technical core of this issue lies in the discrepancy between how different operating systems and file system APIs interpret path strings versus how the application logic processes them for security checks. For instance, a path might be normalized to remove redundant separators or resolve symbolic links during one stage of processing but fail to apply that same normalization consistently when checking against allowlists or deny lists enforced by the IDE's security features. An unauthorized attacker who has local access to the system can exploit this inconsistency by crafting specific file paths that appear valid and safe under initial validation but are resolved differently at runtime, thereby bypassing the intended security boundaries. This allows the execution of arbitrary code or access to protected resources within a context where such actions should be prohibited, effectively undermining the isolation guarantees provided by features like Workspace Trust or secure remote development sessions.
From an operational impact perspective, this vulnerability enables local attackers to compromise the integrity and confidentiality of the development environment without requiring elevated privileges on the operating system itself. By bypassing these security features, an attacker could potentially read sensitive configuration files containing API keys or credentials, modify project settings to inject malicious extensions, or execute code within the extension host process which often runs with higher permissions than standard user processes. This is particularly dangerous in collaborative environments where multiple users share a machine or when working on projects that involve untrusted third-party code, as it allows an attacker to escalate their influence from a limited sandboxed context to full control over the IDE's runtime environment and potentially the underlying system if further exploitation chains are present.
To mitigate this risk, developers must ensure strict consistency in path normalization across all security-critical decision points within the application logic. This involves adopting canonicalization techniques that resolve all symbolic links, remove redundant separators, and handle case sensitivity according to the specific operating system's file system rules before performing any access control checks. Implementing these fixes aligns with industry standards such as CWE-22: Improper Limitation of a Pathname to a Restricted Directory, which addresses path traversal vulnerabilities resulting from insufficient validation of user-supplied input paths. Furthermore, adhering to the MITRE ATT&CK framework's T1059 command and scripting interpretation or T1053 scheduled task execution principles helps in understanding how such bypasses can lead to broader system compromise if not contained within a robust sandbox. Organizations should prioritize applying vendor-provided patches that address these path resolution inconsistencies and enforce strict input validation policies for all file operations initiated by the user interface or extension APIs.