CVE-2026-119574

{
  "etk_id": "ETK-2026-3081",
  "cve_id": "CVE-2026-119574",
  "display_id": "CVE-2026-119574",
  "ghsa_id": "GHSA-r4c9-879g-3g2v",
  "euvd_id": "EUVD-2026-113928",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Race condition in Traefik FastProxy upgrade handling",
  "summary": "Traefik versions 3.2.0 through 3.7.14 with the experimental FastProxy are affected by a race condition in HTTP/1 protocol-upgrade handling. An unauthenticated remote attacker may cause the Traefik process to crash when it accepts upgraded connections.",
  "mitigation": "Upgrade Traefik to version 3.7.15 or later. Until upgrading, disable the experimental FastProxy or restrict untrusted access to HTTP/1 upgrade endpoints.",
  "vendor": "traefik",
  "product": "traefik",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= v3.2.0, <= v3.7.14"
      ],
      "ecosystem": "go",
      "fixed_versions": [
        "v3.7.15"
      ],
      "package_name": "github.com/traefik/traefik/v3",
      "purl": "pkg:golang/github.com/traefik/traefik/v3"
    }
  ],
  "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": "contextual",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": false,
  "pipeline_minutes": 18.547798366666665,
  "t0_at": "2026-10-30T13:18:12.970000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-17T21:35:19.403927+00:00",
      "days": -12.654786644363426,
      "is_lower_bound": false,
      "measured_at": "2026-10-30T13:18:12.970000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-16T08:00:59+00:00",
      "days": -14.220300578703704,
      "is_lower_bound": false,
      "measured_at": "2026-10-30T13:18:12.970000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-119574"
    }
  }
}