{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "2.42.0"
                  },
                  {
                    "fixed": "3.1.1"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              },
              {
                "range": [
                  {
                    "fixed": "24d8ee409d83c438330ff2850b4f159c1222aa27"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              }
            ]
          },
          "events": [
            {
              "introduced": "3de8e38010b8ecb8243b4ff47541c6d9a94805f8"
            },
            {
              "fixed": "4a75141ca7fab2ad70e472203c81adef0dea90a2"
            },
            {
              "fixed": "24d8ee409d83c438330ff2850b4f159c1222aa27"
            }
          ],
          "repo": "https://github.com/sveltejs/kit",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-3r8g-jcqq-3p5j"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-407"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/128xxx/CVE-2026-128120.json"
  },
  "details": "SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. From version 2.42.0 until 3.1.1, applications using the experimental remote functions flag and a remote form function could perform quadratic synchronous work while parsing a specially crafted request with many form entries. The parsing work could block the event loop for an extended period and deny service. This issue is fixed in 3.1.1.",
  "id": "CVE-2026-128120",
  "modified": "2026-11-15T02:30:55.403015992Z",
  "published": "2026-11-13T19:34:08.320Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/kit@3.1.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/128xxx/CVE-2026-128120.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/sveltejs/kit/security/advisories/GHSA-3r8g-jcqq-3p5j"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-128120"
    },
    {
      "type": "FIX",
      "url": "https://github.com/sveltejs/kit/commit/24d8ee409d83c438330ff2850b4f159c1222aa27"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "SvelteKit: DoS while parsing form data from a remote functions `form`"
}