ETK-2026-1908Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-1908",
  "cve_id": null,
  "display_id": "ETK-2026-1908",
  "ghsa_id": "GHSA-ww7c-q3mv-xx22",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Unauthenticated denial of service in Traefik FastProxy",
  "summary": "Traefik deployments with experimental FastProxy enabled are affected by a connection-handling flaw during backend protocol upgrades. An unauthenticated client can cause the Traefik process to terminate, resulting in denial of service; deployments without experimental FastProxy enabled are not affected.",
  "mitigation": "Upgrade Traefik to v3.7.15 or later. Disable experimental FastProxy until the upgrade is complete; upgrade v3.2 through v3.6 deployments to a patched v3.7 release.",
  "vendor": "go",
  "product": "go:Traefik",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= v3.2.0, <= v3.7.14"
      ],
      "ecosystem": "go",
      "fixed_versions": [
        "v3.7.15"
      ],
      "package_name": "Traefik",
      "purl": "pkg:golang/Traefik"
    }
  ],
  "cwes": [
    567
  ],
  "cvss_score": 8.2,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": false,
  "pipeline_minutes": 18.547798366666665,
  "t0_at": null,
  "signals": {
    "check": {
      "at": "2026-10-17T21:35:19.403927+00:00",
      "days": -3.5557730513194445,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T10:55:38.392200+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-16T08:00:59+00:00",
      "days": -5.121286985659722,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T10:55:38.392200+00:00",
      "url": "https://github.com/traefik/traefik/security/advisories/GHSA-ww7c-q3mv-xx22"
    }
  }
}