What’s Vulnerable › Vulnerabilities

CVE-2026-42275: zrok: WebDAV drive backend follows symlinks outside DriveRoot, enabling host filesystem read/write

• Severity: high (CVSS 8.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-08 · updated 2026-10-26
• Weakness: CWE-22

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.

Affected products

• openziti zrok: before 2.0.2 — fixed in 2.0.2

How to fix

Upgrade to a fixed version: openziti zrok 2.0.2. Check the vendor advisory for mitigations.

References

• https://github.com/openziti/zrok/commit/459bcfc1e121decae1b1d11c37ad94e4ed5bbf2e
• https://github.com/openziti/zrok/releases/tag/v2.0.2
• https://github.com/openziti/zrok/security/advisories/GHSA-74m3-9qvm-rp9h

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