{"id":"CVE-2026-63429","summary":"HeyForm has unauthenticated /api/upload endpoint that accepts arbitrary files with no auth/session/form context","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.","aliases":["GHSA-432x-54v2-p7p7"],"modified":"2026-07-24T03:56:57.091236330Z","published":"2026-07-20T15:54:22.075Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63429.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-306","CWE-434"]},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/heyform/heyform","events":[{"introduced":"0"},{"fixed":"092e255e9e02565de1b3c057f3dad849160952d2"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"3.0.0-rc.9"}]}}],"versions":["v3.0.0-rc.8","v3.0.0-rc.7","v3.0.0-rc.6","v3.0.0-rc.5","v3.0.0-rc.4","v3.0.0-rc.3","v3.0.0-rc.2","v3.0.0-rc.1","v3.0.0-alpha.3","v3.0.0-alpha-2","v0.1.0","v0.0.17","v0.0.16","v0.0.15","v0.0.13","v0.0.12","v0.0.11","v0.0.10","v0.0.9","v0.0.8","v0.0.7","v0.0.6","v0.0.5","v0.0.4","v0.0.3","v0.0.2","v0.0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63429.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L"}]}