CVE-2026-40304
zrok: Broken ownership check in DELETE /api/v2/unaccess allows non-admin to delete global frontend records
Impact
zrok is software for sharing web services, files, and network resources. Prior to version 2.0.1, the unaccess handler (controller/unaccess.go) contains a logical error in its ownership guard: when a frontend record has environment_id = NULL (the marker for admin-created global frontends), the condition short-circuits to false and allows the deletion to proceed without any ownership verification. A non-admin user who knows a global frontend token can call DELETE /api/v2/unaccess with any of their own environment IDs and permanently delete the global frontend, taking down all public shares routed through it. Version 2.0.1 patches the issue.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/openziti/zrok | <= 1.1.11 | none recorded |
| go | github.com/openziti/zrok/v2 | < 2.0.1 | 2.0.1 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Netfoundry | Zrok | before 2.0.1 |