Path Traversal in Netfoundry Zrok
CVE-2026-42275
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.005 (37.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.001
Affected products
- Netfoundry Zrok
- Openziti Zrok — versions < 2.0.2
Weakness classification (CWE)
References
- github.com/openziti/zrok/security/advisories/GHSA-74m3-9qvm-rp9h (Vendor Advisory)
- github.com/openziti/zrok/commit/459bcfc1e121decae1b1d11c37ad94e4ed5bbf2e (Patch)
- github.com/openziti/zrok/releases/tag/v2.0.2 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-42275?
- CVE-2026-42275 is a high-severity vulnerability in Netfoundry Zrok, classified under Path Traversal. CVSS score: 8.7/10. Published 2026-05-08.
- How severe is CVE-2026-42275?
- High severity. CVSS v3 base score is 8.7 out of 10.