CVE-2026-107300

{
  "etk_id": "ETK-2026-1041",
  "cve_id": "CVE-2026-107300",
  "display_id": "CVE-2026-107300",
  "ghsa_id": "GHSA-5x5g-h9x8-2fh9",
  "euvd_id": "EUVD-2026-95111",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Stack exhaustion in msgpack5 streaming decoder",
  "summary": "msgpack5 versions before 6.1.0 have a denial-of-service flaw in the streaming decoder. A remote peer able to send a chunk with many valid MessagePack values can exhaust the JavaScript call stack and interrupt the process or stream.",
  "mitigation": "Upgrade msgpack5 to version 6.1.0 or later. Until upgraded, limit the number of MessagePack values accepted per chunk or split large batches before decoding.",
  "vendor": "mcollina",
  "product": "msgpack5",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "< 6.1.0"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        ">= 6.1.0"
      ],
      "package_name": "msgpack5",
      "purl": "pkg:npm/msgpack5"
    }
  ],
  "cwes": [
    674
  ],
  "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": 0.0043,
  "epss_percentile": 0.3555,
  "epss_asof": "2026-10-20",
  "automation": "deterministic",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 23.9926661,
  "t0_at": "2026-10-08T17:11:13.552000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-08T17:11:13.552000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-08T17:11:13.552000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-107300"
    }
  }
}