CVE-2026-42275

zrok: WebDAV drive backend follows symlinks outside DriveRoot, enabling host filesystem read/write

State: Published
Severity: 8.7 High
Published: May 8, 2026
Updated: May 8, 2026
Reserved: Apr 26, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	8.7 High	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N	GitHub_M

Weaknesses

CWE-61 UNIX Symbolic Link (Symlink) Following
CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Affected Products

Product	Versions
zrokopenziti	< 2.0.2Affected

References

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