ETK-2026-3098Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-3098",
  "cve_id": null,
  "display_id": "ETK-2026-3098",
  "ghsa_id": "GHSA-5v64-555j-wjxm",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Memory exhaustion in Rack multipart request parsing",
  "summary": "Rack applications that parse multipart requests can retain excessive request data in the multipart parser's internal buffer. An unauthenticated attacker can send a valid multipart request that exhausts worker memory; the application must accept and parse multipart input.",
  "mitigation": "Upgrade Rack to 2.2.25, 3.1.23, or 3.2.8, as appropriate for the deployed branch. Also cap request body size at the proxy or application boundary and set RACK_MULTIPART_PARSER_BYTESIZE_LIMIT to the maximum multipart upload size required.",
  "vendor": "rubygems",
  "product": "rubygems:rack",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "< 2.2.25"
      ],
      "ecosystem": "rubygems",
      "fixed_versions": [
        "2.2.25"
      ],
      "package_name": "rack",
      "purl": "pkg:gem/rack"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 3.0, < 3.1.23"
      ],
      "ecosystem": "rubygems",
      "fixed_versions": [
        "3.1.23"
      ],
      "package_name": "rack",
      "purl": "pkg:gem/rack"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 3.2, < 3.2.8"
      ],
      "ecosystem": "rubygems",
      "fixed_versions": [
        "3.2.8"
      ],
      "package_name": "rack",
      "purl": "pkg:gem/rack"
    }
  ],
  "cwes": [
    400
  ],
  "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": 22.37815325,
  "t0_at": null,
  "signals": {
    "trigger_signal": {
      "at": "2026-10-30T02:18:55+00:00",
      "days": -1.45167260625,
      "is_lower_bound": true,
      "measured_at": "2026-10-31T13:09:19.545146+00:00",
      "url": "https://github.com/rack/rack/security/advisories/GHSA-5v64-555j-wjxm"
    }
  }
}