ETK-2026-3648Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-3648",
  "cve_id": null,
  "display_id": "ETK-2026-3648",
  "ghsa_id": "GHSA-f7j6-p4qx-gq99",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "JWT algorithm confusion in authlib.jose key handling",
  "summary": "Authlib applications using authlib.jose are affected when they supply certain OpenSSH public-key material to JWT verification without limiting allowed algorithms. An attacker who has the public key may create an HMAC-signed token that the application accepts, including attacker-chosen claims.",
  "mitigation": "Upgrade authlib to 1.9.5. Until upgraded, explicitly allow only the expected asymmetric algorithms and pass typed key objects rather than raw key bytes.",
  "vendor": "pip",
  "product": "pip:Authlib",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 1.3.1, <= 1.9.4"
      ],
      "ecosystem": "pip",
      "fixed_versions": [
        "1.9.5"
      ],
      "package_name": "authlib",
      "purl": "pkg:pypi/authlib"
    }
  ],
  "cwes": [
    184
  ],
  "cvss_score": 7.4,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 9.766850033333334,
  "t0_at": null,
  "signals": {
    "trigger_signal": {
      "at": "2026-11-05T16:18:09+00:00",
      "days": -0.12074001667824075,
      "is_lower_bound": true,
      "measured_at": "2026-11-05T19:12:00.982077+00:00",
      "url": "https://github.com/authlib/authlib/security/advisories/GHSA-f7j6-p4qx-gq99"
    }
  }
}