ETK-2026-3770Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-3770",
  "cve_id": null,
  "display_id": "ETK-2026-3770",
  "ghsa_id": "GHSA-fgvp-cqg6-q8h2",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "JWT role row-level security bypass in Supabase Storage",
  "summary": "Supabase Storage versions 1.89.8 and earlier can bypass row-level security when processing a valid signed JWT whose role claim is `none`. An attacker with such a token may read private objects, upload objects, or create buckets when the Storage connection user owns the relevant tables and row-level security is not forced; obtaining the token requires a trusted issuer to emit that role.",
  "mitigation": "Upgrade Supabase Storage to version 1.89.9 or later. Until upgraded, stop trusted token issuers from issuing the `none` role and reject that role at every Storage entry point, including any direct origin access.",
  "vendor": null,
  "product": "Supabase Storage",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= 1.89.8"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "1.89.9"
      ],
      "package_name": null,
      "purl": null
    }
  ],
  "cwes": [
    270
  ],
  "cvss_score": 9.8,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 9.90883165,
  "t0_at": null,
  "signals": {
    "trigger_signal": {
      "at": "2026-11-06T22:44:47+00:00",
      "days": -1.0908327304282408,
      "is_lower_bound": true,
      "measured_at": "2026-11-08T00:55:34.985612+00:00",
      "url": "https://github.com/supabase/storage/security/advisories/GHSA-fgvp-cqg6-q8h2"
    }
  }
}