CVE-2026-40304
Description
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/openziti/zrokGo | <= 1.1.11 | — |
github.com/openziti/zrok/v2Go | < 2.0.1 | 2.0.1 |
Affected products
3- ghsa-coords2 versions
<= 1.1.11+ 1 more
- (no CPE)range: <= 1.1.11
- (no CPE)range: < 2.0.1
Patches
Vulnerability mechanics
References
4- github.com/advisories/GHSA-3jpj-v3xr-5h6gghsaADVISORY
- github.com/openziti/zrok/security/advisories/GHSA-3jpj-v3xr-5h6gnvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-40304ghsaADVISORY
- github.com/openziti/zrok/releases/tag/v2.0.1nvdRelease NotesWEB
News mentions
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