GHSA-3jpj-v3xr-5h6gPublished

zrok: Broken ownership check in DELETE /api/v2/unaccess allows non-admin to delete global frontend records

Exact source revision recorded 24 Oct 2026 13:19:41 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

osv · GHSA-3jpj-v3xr-5h6g

Published

Summary 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. Attack Vector: Network — the endpoint is a standard HTTP API call. Attack Complexity: High — successful exploitation requires prior knowledge of a global frontend token. These tokens are not returned to non-admin users by any standard API endpoint; obtaining one requires an out-of-band step (e.g., leaked server logs, admin documentation for a self-hosted instance, or social engineering). Privileges Required: Low — a valid user account with at least one registered environment is required; no admin privileges needed. User Interaction: None. Scope: Unchanged — the impact stays within the same server instance. Confidentiality Impact: None — no data is disclosed. Integrity Impact: None — no data is improperly modified; the record is deleted (not corrupted). Availability Impact: High — deleting a global frontend disrupts every public share routed through it on the instance, constituting a platform-wide availability impact. Affected Component controller/unaccess.go — unaccessHandler.Handle (line 56)

Source published: 16 Apr 2026 21:09:23 UTC
Source modified: 25 Jun 2026 18:56:36 UTC
Observed here: 24 Oct 2026 13:19:41 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V3 · CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Publisher rating · MODERATE