CVE-2026-40304

[Catalogo CVE]

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.

Gravità

Medium · CVSS 5.3CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Published

Apr 17, 2026, 10:16:32 PM UTC

Source

[NVD] · [CVE record]

EPSS

0.29% · Oct 27, 2026

{
  "package_releases": [],
  "fixed_versions": [],
  "distribution_packages": [
    {
      "name": "zrok",
      "ecosystem": "cpe",
      "fixed_version": "2.0.1",
      "provider_source": "nvd"
    },
    {
      "name": "zrok",
      "ranges": [
        {
          "fixed": "2.0.1",
          "introduced": "",
          "last_affected": "",
          "start_excluding": ""
        }
      ],
      "ecosystem": "cpe",
      "provider_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40304",
      "fixed_version": "2.0.1",
      "provider_source": "nvd",
      "provider_record_id": "NVD-CVE-2026-40304",
      "provider_updated_at": "2026-10-26T22:10:00.163"
    }
  ]
}