CVE-2026-45568 openziti CVE debrief

Who should care

Users of zrok's Python SDK ProxyShare Flask proxy route, particularly those who have not upgraded to version 2.0.3, should be aware of this critical vulnerability and take immediate action to upgrade. Additionally, security teams and vulnerability management teams should review the affected scope and severity to determine the necessary mitigations.

Technical summary

The 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. The vulnerability has a high impact on confidentiality, integrity, and availability.

Defensive priority

High

Recommended defensive actions

• Upgrade to version 2.0.3 or later
• Review and restrict URL inputs to prevent absolute URL attacks
• Monitor for suspicious activity and implement compensating controls
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. Further investigation and review of the zrok codebase and configuration are necessary to fully understand the impact and implement effective mitigations. The evidence is based on the official CVE record and NVD entry, which may have limitations and uncertainties.

Official resources