CVE-2026-42275
HighSummary
Zrok is software for sharing web services, files, and network resources. Prior to version 2.0.2, the zrok WebDAV drive backend (davServer.Dir) restricts path traversal through lexical normalization but does not prevent symlink following, allowing access to files outside the shared directory.
Risk Assessment
An attacker can access files on the host filesystem, and in the case of shares without OS-level permission restrictions, may also modify or overwrite files. This poses a serious threat to data integrity and confidentiality.
Recommendation
It is recommended to upgrade to version 2.0.2 or later to mitigate this vulnerability. Additionally, implementing appropriate OS-level permission restrictions for shared resources is advisable.
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Original NVD description (English source)
zrok is software for sharing web services, files, and network resources. Prior to version 2.0.2, the zrok WebDAV drive backend (davServer.Dir) restricts path traversal through lexical normalization but does not prevent symlink following. When a symbolic link inside the shared DriveRoot points to a location outside that root, remote WebDAV consumers can read files and—on shares without OS-level permission restrictions—write or overwrite files anywhere on the host filesystem accessible to the zrok process. This issue has been patched in version 2.0.2.