ETK-2026-4349Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-4349",
  "cve_id": null,
  "display_id": "ETK-2026-4349",
  "ghsa_id": "GHSA-rf6g-xhmp-gm7v",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Connection exhaustion denial of service in Puma",
  "summary": "Puma deployments that accept connections directly from clients can be disrupted through exhaustion of the process file-descriptor limit. An unauthenticated attacker can sustain idle connections, causing excessive logging that may exhaust disk space and stop Puma from accepting new connections. Deployments protected by a proxy or load balancer that limits connections to Puma are not affected by this condition.",
  "mitigation": "Upgrade Puma to version 7.2.2 or 8.0.3. Limit per-client connections at a reverse proxy or load balancer, and ensure Puma logs are rotated or written to storage that cannot fill the host disk.",
  "vendor": "rubygems",
  "product": "rubygems:puma",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "< 7.2.2"
      ],
      "ecosystem": "rubygems",
      "fixed_versions": [
        "7.2.2"
      ],
      "package_name": "puma",
      "purl": "pkg:gem/puma"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 8.0.0, < 8.0.3"
      ],
      "ecosystem": "rubygems",
      "fixed_versions": [
        "8.0.3"
      ],
      "package_name": "puma",
      "purl": "pkg:gem/puma"
    }
  ],
  "cwes": [
    400
  ],
  "cvss_score": 8.7,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/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": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 12.3589773,
  "t0_at": null,
  "signals": {
    "trigger_signal": {
      "at": "2026-11-13T05:12:03+00:00",
      "days": -0.10686923381944445,
      "is_lower_bound": true,
      "measured_at": "2026-11-13T07:45:56.611616+00:00",
      "url": "https://github.com/puma/puma/security/advisories/GHSA-rf6g-xhmp-gm7v"
    }
  }
}