CVEvulnerability

CVE-2026-63429

8.6 HIGH Published 2026-07-20 Modified 2026-07-22 Official page ↗
Status
Deferred
Published
2026-07-20
Last modified
2026-07-22
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.6 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
Weaknesses
CWE-306, CWE-434

Description

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.

Related

Weakness · CWE (2)

  • CWE-306 Missing Authentication for Critical Functionality weakness
  • CWE-434 Unrestricted Upload of File with Dangerous Type weakness

References