CVE-2026-100403

{
  "etk_id": "ETK-2026-4419",
  "cve_id": "CVE-2026-100403",
  "display_id": "CVE-2026-100403",
  "ghsa_id": "GHSA-4vgv-v5ph-rmxr",
  "euvd_id": "EUVD-2026-125694",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Unbounded WebSocket message buffering in bacnet-stack",
  "summary": "BACnet Stack BACnet/SC hubs using the Linux WebSocket server are affected before versions 1.4.6, 1.5.2, and 1.6.1. A remote peer can cause the hub process or host to run out of memory by maintaining an incomplete fragmented WebSocket message. The attacker must be able to establish a connection to the affected WebSocket service.",
  "mitigation": "Upgrade bacnet-stack to 1.4.6, 1.5.2, or 1.6.1, as appropriate for the maintained release line. Until upgraded, restrict network access to the BACnet/SC hub WebSocket service to trusted peers.",
  "vendor": "bacnet-stack",
  "product": "bacnet-stack",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= 1.6.0"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "1.4.6",
        "1.5.2",
        "1.6.1",
        "1.7.0"
      ],
      "package_name": "bacnet-stack",
      "purl": null
    }
  ],
  "cwes": [
    400
  ],
  "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": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 44.13516695,
  "t0_at": "2026-11-13T18:41:06.709000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-11-13T18:41:06.709000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-11-13T18:41:06.709000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-100403"
    }
  }
}