ETK-2026-3187Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-3187",
  "cve_id": null,
  "display_id": "ETK-2026-3187",
  "ghsa_id": "GHSA-86wx-fcwx-m3vh",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Use-after-free in ngx_mruby stream async sleep handling",
  "summary": "ngx_mruby stream handlers that use Nginx::Stream::Async.sleep can retain a timer after a session ends, causing a use-after-free. A remote client can crash a worker on affected UDP stream services; affected TCP services require a worker shutdown or configuration reload while the sleep is pending. The HTTP asynchronous sleep path is not affected.",
  "mitigation": "Upgrade ngx_mruby to version 2.7.3. Until upgraded, remove Nginx::Stream::Async.sleep calls from stream handlers.",
  "vendor": "other",
  "product": "other:ngx_mruby",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= 2.7.2"
      ],
      "ecosystem": "other",
      "fixed_versions": [
        "2.7.3"
      ],
      "package_name": "ngx_mruby",
      "purl": null
    }
  ],
  "cwes": [
    416
  ],
  "cvss_score": 7,
  "cvss_src": "ethiack_provisional",
  "cvss_vector": null,
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 33.27147753333333,
  "t0_at": null,
  "signals": {
    "trigger_signal": {
      "at": "2026-10-31T15:08:33+00:00",
      "days": -0.2868959004513889,
      "is_lower_bound": true,
      "measured_at": "2026-10-31T22:01:40.837706+00:00",
      "url": "https://github.com/matsumotory/ngx_mruby/security/advisories/GHSA-86wx-fcwx-m3vh"
    }
  }
}