ETK-2026-3870Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-3870",
  "cve_id": null,
  "display_id": "ETK-2026-3870",
  "ghsa_id": "GHSA-w2w4-j3wm-rrpp",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Integer underflow in rust libhost-vuln-ghsa-w2w4-j3wm-rrpp-verbatim",
  "summary": "Versions before 9.1.0 can panic while parsing malformed ZIP archives because of unchecked offset arithmetic. An attacker able to supply a ZIP archive to an affected application or service may cause a denial of service; multi-disk archive metadata is also insufficiently validated.",
  "mitigation": "Upgrade the Rust package to version 9.1.0 or later. Until upgraded, avoid processing untrusted ZIP archives in affected services or isolate archive parsing behind process-failure containment.",
  "vendor": "rust",
  "product": "zip2",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "< 9.1.0"
      ],
      "ecosystem": "rust",
      "fixed_versions": [
        "9.1.0"
      ],
      "package_name": null,
      "purl": null
    }
  ],
  "cwes": [
    20
  ],
  "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": 17.941719916666667,
  "t0_at": null,
  "signals": {
    "public_poc": {
      "at": "2026-11-07T21:54:17+00:00",
      "days": -0.4398523675115741,
      "is_lower_bound": true,
      "measured_at": "2026-11-08T08:27:40.284106+00:00",
      "url": "https://github.com/zip-rs/zip2/security/advisories/GHSA-w2w4-j3wm-rrpp"
    },
    "trigger_signal": {
      "at": "2026-11-07T21:54:17+00:00",
      "days": -0.4398523675115741,
      "is_lower_bound": true,
      "measured_at": "2026-11-08T08:27:40.284106+00:00",
      "url": "https://github.com/zip-rs/zip2/security/advisories/GHSA-w2w4-j3wm-rrpp"
    }
  }
}