{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "3.0.0-rc.9"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "092e255e9e02565de1b3c057f3dad849160952d2"
            }
          ],
          "repo": "https://github.com/heyform/heyform",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-432x-54v2-p7p7"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-306",
      "CWE-434"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63429.json"
  },
  "details": "HeyForm is an open-source form builder. Prior to version 3.0.0-rc.9, `POST /api/upload` has no authentication guard, no global guard, no form-context validation, no `openToken` requirement, and no session cookie check. Any anonymous internet user can upload files (PDF, DOC/DOCX, XLS/XLSX, CSV, TXT, MP4, images, etc., up to 10 MB) and receive a permanent public URL on the HeyForm domain. The endpoint is used by both authenticated form creators and unauthenticated form submitters; because no form-context binding exists, every request to it is anonymously accepted. Version 3.0.0-rc.9 contains a patch for the issue.",
  "id": "CVE-2026-63429",
  "modified": "2026-07-24T03:56:57.091236330Z",
  "published": "2026-07-20T15:54:22.075Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63429.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/heyform/heyform/security/advisories/GHSA-432x-54v2-p7p7"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63429"
    },
    {
      "type": "FIX",
      "url": "https://github.com/heyform/heyform/commit/092e255e9e02565de1b3c057f3dad849160952d2"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "HeyForm has unauthenticated /api/upload endpoint that accepts arbitrary files with no auth/session/form context"
}