ETK-2026-3625Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-3625",
  "cve_id": null,
  "display_id": "ETK-2026-3625",
  "ghsa_id": "GHSA-wcj3-m6rw-7gv9",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Nil-pointer denial of service in maddy rate-limit cleanup",
  "summary": "maddy versions before 0.9.7 can panic during SMTP rate-limit cleanup when source-scoped limits are configured without IP-scoped limits. An unauthenticated remote client can cause the mail server process to terminate after the source limiter is exhausted. This requires an inbound SMTP endpoint using that rate-limit configuration.",
  "mitigation": "Upgrade github.com/foxcpp/maddy to version 0.9.7 or later. Until upgraded, avoid configuring source-scoped rate limits without an IP-scoped limit on exposed SMTP endpoints.",
  "vendor": "go",
  "product": "go:github.com/foxcpp/maddy",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<=0.9.6"
      ],
      "ecosystem": "go",
      "fixed_versions": [
        "0.9.7"
      ],
      "package_name": "github.com/foxcpp/maddy",
      "purl": "pkg:golang/github.com/foxcpp/maddy"
    }
  ],
  "cwes": [
    476
  ],
  "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": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 19.81500936666667,
  "t0_at": null,
  "signals": {
    "public_poc": {
      "at": "2026-11-05T13:04:34+00:00",
      "days": -0.35366185069444445,
      "is_lower_bound": true,
      "measured_at": "2026-11-05T21:33:50.599252+00:00",
      "url": "https://github.com/foxcpp/maddy/security/advisories/GHSA-wcj3-m6rw-7gv9"
    },
    "trigger_signal": {
      "at": "2026-11-05T13:04:34+00:00",
      "days": -0.35366185069444445,
      "is_lower_bound": true,
      "measured_at": "2026-11-05T21:33:50.599252+00:00",
      "url": "https://github.com/foxcpp/maddy/security/advisories/GHSA-wcj3-m6rw-7gv9"
    }
  }
}