CVE-2026-63429

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Source
https://cve.org/CVERecord?id=CVE-2026-63429
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63429.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-63429
Aliases
  • GHSA-432x-54v2-p7p7
Published
2026-07-20T15:54:22Z
Modified
2026-10-28T02:30:49Z
Severity
  • 8.6 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L CVSS Calculator
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.

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"
}
References

Affected packages

Git / github.com/heyform/heyform

Affected ranges

Type
GIT
Repo
https://github.com/heyform/heyform
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
84d8c9993ae1c89b9a9e4793dac4331a26b12ba3
Fixed
092e255e9e02565de1b3c057f3dad849160952d2
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "3.0.0-rc.9"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "092e255e9e02565de1b3c057f3dad849160952d2"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

v0.*
v0.0.1
v0.0.10
v0.0.11
v0.0.12
v0.0.13
v0.0.15
v0.0.16
v0.0.17
v0.0.2
v0.0.3
v0.0.4
v0.0.5
v0.0.6
v0.0.7
v0.0.8
v0.0.9
v0.1.0
v3.*
v3.0.0-alpha-2
v3.0.0-alpha.3
v3.0.0-rc.1
v3.0.0-rc.2
v3.0.0-rc.3
v3.0.0-rc.4
v3.0.0-rc.5
v3.0.0-rc.6
v3.0.0-rc.7
v3.0.0-rc.8

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63429.json"