vitest-dev vitest up to 4.1.11/5.0.2 mocker interceptorPlugin.ts isFileLoadingAllowed path traversal

Summaryinfo

A vulnerability classified as problematic was found in vitest-dev vitest up to 4.1.11/5.0.2. This affects the function isFileLoadingAllowed of the file packages/mocker/src/node/interceptorPlugin.ts of the component mocker. Executing a manipulation can lead to path traversal. This vulnerability is tracked as CVE-2026-112950. The attack can be launched remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in vitest-dev vitest up to 4.1.11/5.0.2 and classified as problematic. This vulnerability affects the function isFileLoadingAllowed of the file packages/mocker/src/node/interceptorPlugin.ts of the component mocker. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality. CVE summarizes:

Vitest is a Vite-native testing framework for JavaScript and TypeScript projects. From 4.1.11 until 4.1.12 and 5.0.3, isFileLoadingAllowed and the filesystem read interpret backslashes differently on Windows in packages/mocker/src/node/interceptorPlugin.ts. When a client can reach the Vite dev server on Windows and register a redirect mock containing backslash traversal, POSIX joining preserves a Windows backslash traversal that the later filesystem read interprets as a path separator, so the client can read a file outside server.fs.allow that the Vitest process can access. This issue is fixed in versions 4.1.12 and 5.0.3.

The advisory is available at github.com. This vulnerability was named CVE-2026-112950 since 10/19/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

Upgrading to version 4.1.12 or 5.0.3 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• vitest-dev

Name

• vitest

Version

• 4.1.0
• 4.1.1
• 4.1.2
• 4.1.3
• 4.1.4
• 4.1.5
• 4.1.6
• 4.1.7
• 4.1.8
• 4.1.9
• 4.1.10
• 4.1.11
• 5.0.0
• 5.0.1
• 5.0.2

Website

• Product: https://github.com/vitest-dev/vitest/

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