CVE-2026-107579

{
  "etk_id": "ETK-2026-1279",
  "cve_id": "CVE-2026-107579",
  "display_id": "CVE-2026-107579",
  "ghsa_id": "GHSA-7658-76c6-34x2",
  "euvd_id": "EUVD-2026-94861",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Algorithmic complexity denial of service in hMailServer",
  "summary": "hMailServer 6.3.4 and 6.3.5 can spend excessive processing time handling certain inbound delivery-status or abuse-report messages. An unauthenticated remote sender may disrupt mail delivery when bounce processing, complaint processing, or server-managed mailing lists are enabled.",
  "mitigation": "Upgrade hMailServer to version 6.3.6. Until upgrading, disable bounce and complaint processing and avoid server-managed mailing lists where operationally feasible.",
  "vendor": "Progressive Robot Ltd",
  "product": "hMailServer",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 6.3.4, < 6.3.6"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "6.3.6"
      ],
      "package_name": "hMailServer",
      "purl": null
    }
  ],
  "cwes": [
    407
  ],
  "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": 0.0035,
  "epss_percentile": 0.2683,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 49.64103441666666,
  "t0_at": "2026-10-08T11:47:06.084000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-08T11:47:06.084000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-08T11:47:06.084000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-107579"
    }
  }
}