CVE-2026-40304
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.
- CVSS 3.1
- 5.3
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 20% of CVEs (scores of 2026-10-26)
- CWEs
- CWE-284, CWE-863
- Published
- Modified
- Record from
- the NVD, synced
Affected
- netfoundry:zrok
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-3jpj-v3xr-5h6g | Go | github.com/openziti/zrok | <=1.1.11 | no fix published |
| GHSA-3jpj-v3xr-5h6g | Go | github.com/openziti/zrok/v2 | <2.0.1 | 2.0.1 |
| GO-2026-5090 | Go | github.com/openziti/zrok | all versions | no fix published |
| GO-2026-5090 | Go | github.com/openziti/zrok/v2 | <2.0.1 | 2.0.1 |