ETK-2026-1622Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-1622",
  "cve_id": null,
  "display_id": "ETK-2026-1622",
  "ghsa_id": "GHSA-f2r8-76jf-vprh",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Missing OAuth client consent in ToolHive auth server",
  "summary": "ToolHive embedded authorization server versions 0.9.1 through 0.51.4 do not require user approval for dynamically registered OAuth clients. An attacker can obtain tokens associated with a victim after the victim follows an authorization link and authenticates through a configured upstream identity provider.",
  "mitigation": "Upgrade github.com/stacklok/toolhive to version 0.52.0 or later. Until then, block registration requests at the ingress or reverse proxy when all clients are pre-registered; account separately for CIMD clients if enabled.",
  "vendor": "go",
  "product": "go:github.com/stacklok/toolhive",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0.9.1, < 0.52.0"
      ],
      "ecosystem": "go",
      "fixed_versions": [
        "0.52.0"
      ],
      "package_name": "github.com/stacklok/toolhive",
      "purl": "pkg:golang/github.com/stacklok/toolhive"
    }
  ],
  "cwes": [
    862
  ],
  "cvss_score": 8.1,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": false,
  "pipeline_minutes": 26.55617525,
  "t0_at": null,
  "signals": {
    "check": {
      "at": "2026-10-15T02:24:43.304678+00:00",
      "days": -6.601453808078704,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T16:50:48.952914+00:00",
      "url": null
    },
    "public_poc": {
      "at": "2026-10-14T17:41:21+00:00",
      "days": -6.964906408518519,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T16:50:48.952914+00:00",
      "url": "https://github.com/stacklok/toolhive/security/advisories/GHSA-f2r8-76jf-vprh"
    },
    "trigger_signal": {
      "at": "2026-10-14T17:41:21+00:00",
      "days": -6.964906408518519,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T16:50:48.952914+00:00",
      "url": "https://github.com/stacklok/toolhive/security/advisories/GHSA-f2r8-76jf-vprh"
    }
  }
}