CVE-2026-104848

{
  "etk_id": "ETK-2026-355",
  "cve_id": "CVE-2026-104848",
  "display_id": "CVE-2026-104848",
  "ghsa_id": "GHSA-5gmw-xhrv-c9v3",
  "euvd_id": "EUVD-2026-91718",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Prototype pollution code execution in tinypool",
  "summary": "Tinypool versions before 2.1.1 can forward prototype-inherited worker settings when creating Node.js worker threads. An attacker who can first pollute Object.prototype may cause newly created workers to execute attacker-selected JavaScript with the host process privileges.",
  "mitigation": "Upgrade the npm package tinypool to version 2.1.1 or later. Until upgraded, prevent prototype-pollution flaws from reaching the application and restrict untrusted dependency or input processing.",
  "vendor": "tinylibs",
  "product": "tinypool",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= 2.1.0"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        "2.1.1"
      ],
      "package_name": "tinypool",
      "purl": "pkg:npm/tinypool"
    }
  ],
  "cwes": [
    1321
  ],
  "cvss_score": 9.5,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
  "epss_score": 0.005,
  "epss_percentile": 0.4139,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": true,
  "check_confidence_basis": "assessed",
  "exploit": false,
  "pipeline_minutes": 6.927821233333333,
  "t0_at": "2026-10-02T16:15:04.101000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-05T23:44:23.038524+00:00",
      "days": 3.312024739861111,
      "is_lower_bound": false,
      "measured_at": "2026-10-02T16:15:04.101000+00:00",
      "url": null
    },
    "public_poc": {
      "at": "2026-10-05T22:50:01+00:00",
      "days": 3.274269664351852,
      "is_lower_bound": false,
      "measured_at": "2026-10-02T16:15:04.101000+00:00",
      "url": "https://github.com/advisories/GHSA-5gmw-xhrv-c9v3"
    },
    "trigger_signal": {
      "at": "2026-10-02T16:15:04.101000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-02T16:15:04.101000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-104848"
    }
  }
}