CVE-2026-40304

MEDIUM EPSS 20.3%
Published Apr 17, 20262mo ago · Modified Jun 17, 20262w ago
5.3 CVSS 3.1
Medium
Find Similar
Published Apr 17, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
5.3
Exploitability
1.6
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
20.3% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 2

CWE-284
CWE-863 Incorrect Authorization Authorization

Affected Products 1

VendorProductVersionRange
netfoundryzrok* <2.0.1

References 2

  • github.com https://github.com/openziti/zrok/releases/tag/v2.0.1
    Release Notes
  • github.com https://github.com/openziti/zrok/security/advisories/GHSA-3jpj-v3xr-5h6g
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.