CVE-2026-45576

HighCVSS 7.5

Published: 16/07/2026(UTC)Updated: 20/07/2026(UTC)Translated: 21/07/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.33%

26th percentile - higher than 26% of all known CVEs

Summary

A vulnerability in zrok (versions 0.4.23 through 2.0.3) allows an attacker to write files outside the selected local destination root via attacker-controlled WebDAV or zrok drive paths like /../outside.txt. The issue is fixed in version 2.0.3.

Risk Assessment

An attacker can overwrite or place malicious files anywhere on the filesystem, potentially leading to privilege escalation, unauthorized code execution, or data integrity compromise.

Recommendation

Immediately upgrade zrok to version 2.0.3 or later. If upgrading is not possible, restrict trust in WebDAV and zrok drive sources.

Other vulnerabilities in zrok

CVE-2026-45568Critical
A vulnerability in zrok before version 2.0.3 allows an attacker to pass an absolute URL in the request path to the Flask proxy route of the Python SDK. The urllib.parse.urljoin function enables replacing the configured target host, causing the server to make a request to an attacker-chosen URL.

Original NVD description (English source)

zrok is software for sharing web services, files, and network resources. From 0.4.23 until 2.0.3, `zrok2 copy` stores attacker-controlled WebDAV or zrok drive paths such as /../outside.txt in the source inventory and passes them to FilesystemTarget.WriteStream, allowing the sync pipeline to write files outside the selected local filesystem destination root. This issue is fixed in version 2.0.3.