kekingcn kkFileView up to 5.0.0 File endpoint FileController.java FileController#getFiles path traversal

Summaryinfo

A vulnerability has been found in kekingcn kkFileView up to 5.0.0 and classified as problematic. This impacts the function FileController#getFiles of the file server/src/main/java/cn/keking/web/controller/FileController.java of the component File endpoint. This manipulation causes path traversal. This vulnerability appears as CVE-2026-73244. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in kekingcn kkFileView up to 5.0.0. It has been declared as problematic. Affected by this vulnerability is the function FileController#getFiles of the file server/src/main/java/cn/keking/web/controller/FileController.java of the component File endpoint. 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. The summary by CVE is:

kkFileView is a universal file online preview project based on Spring Boot. Prior to 5.0.1, the unauthenticated POST /listFiles endpoint in server/src/main/java/cn/keking/web/controller/FileController.java passes the user-controlled path parameter from FileController#getFiles to Files.newDirectoryStream without confinement to the demo directory, allowing directory enumeration outside the intended root. This issue is fixed in version 5.0.1.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-73244 since 08/11/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

Upgrading to version 5.0.1 eliminates this vulnerability.

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Productinfo

Vendor

• kekingcn

Name

• kkFileView

Version

• 5.0

Website

• Product: https://github.com/kekingcn/kkFileView/

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