CVE-2026-128120

{
  "etk_id": "ETK-2026-4420",
  "cve_id": "CVE-2026-128120",
  "display_id": "CVE-2026-128120",
  "ghsa_id": "GHSA-3r8g-jcqq-3p5j",
  "euvd_id": "EUVD-2026-125732",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Quadratic form parsing denial of service in SvelteKit",
  "summary": "SvelteKit applications from 2.42.0 through 3.1.0 may spend excessive synchronous time parsing form submissions. An attacker can cause event-loop blocking and deny service by sending a request with many form entries, provided the application enables experimental remote functions and uses a remote form function.",
  "mitigation": "Upgrade the kit package to version 3.1.1. Until upgrade is complete, disable experimental remote functions or avoid remote form functions where feasible.",
  "vendor": "sveltejs",
  "product": "kit",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 2.42.0, <= 3.1.0"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        "3.1.1"
      ],
      "package_name": "@sveltejs/kit",
      "purl": "pkg:npm/@sveltejs/kit"
    }
  ],
  "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": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 34.86338043333333,
  "t0_at": "2026-11-13T19:34:08.320000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-29T23:47:31+00:00",
      "days": -14.824043055555556,
      "is_lower_bound": false,
      "measured_at": "2026-11-13T19:34:08.320000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-128120"
    }
  }
}