{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.69.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "DESCRIPTION"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "d89edcc5a37ffe45e768c3228683cd36ae1a4d73"
            }
          ],
          "repo": "https://github.com/sveltejs/kit",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-866w-xmhq-wj7x"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-1321"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82257.json"
  },
  "details": "SvelteKit versions before 2.69.1 contain a prototype pollution vulnerability in remote form functions with file input fields that accept arbitrary user-controlled path names. Attackers can manipulate the deletion path to remove methods on the prototype, potentially disabling application functionality.",
  "id": "CVE-2026-82257",
  "modified": "2026-08-30T03:30:40.409756063Z",
  "published": "2026-08-28T10:49:41.355Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82257.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/sveltejs/kit/security/advisories/GHSA-866w-xmhq-wj7x"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82257"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/sveltekit-before-2.69.1-prototype-pollution-via-file-input"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "SvelteKit before 2.69.1 Prototype Pollution via File Input"
}