CVE-2026-45568
CriticalCVSS 9.1Exploitation Probability (EPSS)
Low risk28th percentile - higher than 28% of all known CVEs
Summary
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.
Risk Assessment
An attacker can exploit this vulnerability to perform Server-Side Request Forgery (SSRF) attacks, potentially accessing internal network resources or making unauthorized requests on behalf of the server.
Recommendation
Immediately upgrade zrok to version 2.0.3 or later, which includes a fix for this vulnerability.
Original NVD description (English source)
zrok is software for sharing web services, files, and network resources. Prior to 2.0.3, zrok's Python SDK ProxyShare Flask proxy route accepts an absolute URL in the request path and passes it to urllib.parse.urljoin, allowing the requested path to replace the configured target host and causing requests.request to return a server-side response from an attacker-chosen URL. This issue is fixed in version 2.0.3.