ETK-2026-3805Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-3805",
  "cve_id": null,
  "display_id": "ETK-2026-3805",
  "ghsa_id": "GHSA-qf2w-mm2p-jmg9",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Regular expression denial of service in signalk-server subscriptions",
  "summary": "Affected signalk-server releases process WebSocket subscription patterns in a way that can cause excessive regular-expression evaluation. A remote client may make the service unresponsive by submitting crafted subscription and message data; default configurations allow this without authentication.",
  "mitigation": "Upgrade the npm signalk-server package to version 2.37.0 or later. Until upgraded, restrict access to the WebSocket service and require authentication for clients that can create subscriptions or submit data.",
  "vendor": "npm",
  "product": "signalk-server",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= 2.34.0"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        "2.37.0"
      ],
      "package_name": "signalk-server",
      "purl": "pkg:npm/signalk-server"
    }
  ],
  "cwes": [
    1333
  ],
  "cvss_score": 7.5,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": false,
  "pipeline_minutes": 13.9867698,
  "t0_at": null,
  "signals": {
    "check": {
      "at": "2026-11-07T07:56:26.706915+00:00",
      "days": -0.12572236097222222,
      "is_lower_bound": true,
      "measured_at": "2026-11-07T10:57:29.186701+00:00",
      "url": null
    },
    "public_poc": {
      "at": "2026-11-07T07:15:05+00:00",
      "days": -0.15444582063657408,
      "is_lower_bound": true,
      "measured_at": "2026-11-07T10:57:29.186701+00:00",
      "url": "https://github.com/SignalK/signalk-server/security/advisories/GHSA-qf2w-mm2p-jmg9"
    },
    "trigger_signal": {
      "at": "2026-11-07T07:15:05+00:00",
      "days": -0.15444582063657408,
      "is_lower_bound": true,
      "measured_at": "2026-11-07T10:57:29.186701+00:00",
      "url": "https://github.com/SignalK/signalk-server/security/advisories/GHSA-qf2w-mm2p-jmg9"
    }
  }
}