Security advisory
Formidable (aka node-formidable) 2.1.0 through 3.x before 3.5.3 relies on hexoid to prevent guessing of filenames for untrusted executable content; however, hexoid is documented as not "cryptographically secure." (Also, there is a scenario in which only the last two characters of a hexoid string need to be guessed, but this is not often relevant.) NOTE: this does not imply that, in a typical use case, attackers will be able to exploit any hexoid behavior to upload and execute their own content.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2025-46653
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 7 Nov 2026, 01:16 UTC · Revision 1
Source evidence
Formidable (aka node-formidable) 2.1.0 through 3.x before 3.5.3 relies on hexoid to prevent guessing of filenames for untrusted executable content; however, hexoid is documented as not "cryptographically secure." (Also, there is a scenario in which only the last two characters of a hexoid string need to be guessed, but this is not often relevant.) NOTE: this does not imply that, in a typical use case, attackers will be able to exploit any hexoid behavior to upload and execute their own content.
osv:CVE-2025-46653
Complete source record
{
"id": "3c612343db98e6b0ce9e4f4d77d810cc93ca91e3a6df51758f7eddc15ba783f5",
"url": "https://osv.dev/vulnerability/CVE-2025-46653",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2025-46653",
"summary": "Formidable (aka node-formidable) 2.1.0 through 3.x before 3.5.3 relies on hexoid to prevent guessing of filenames for untrusted executable content; however, hexoid is documented as not \"cryptographically secure.\" (Also, there is a scenario in which only the last two characters of a hexoid string need to be guessed, but this is not often relevant.) NOTE: this does not imply that, in a typical use case, attackers will be able to exploit any hexoid behavior to upload and execute their own content.",
"evidence": "osv:CVE-2025-46653",
"products": [],
"severity": "low",
"structured": {
"id": "CVE-2025-46653",
"aliases": [
"CVE-2025-46653",
"GHSA-75v8-2h7p-7m2m"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/node-formidable/formidable",
"type": "GIT",
"events": [
{
"introduced": "6da191c2eb926fbe5b146d67826ca9a8b8ddac0f"
},
{
"fixed": "0bf31f65877fa1dce4c163c0f3a0e588afbbe45b"
},
{
"fixed": "022c2c5577dfe14d2947f10909d81b03b6070bf5"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:node-formidable:formidable:*:*:*:*:*:node.js:*:*",
"range": [
{
"introduced": "2.1.0"
},
{
"fixed": "3.5.3"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "022c2c5577dfe14d2947f10909d81b03b6070bf5"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-46653.json"
}
}
],
"modified": "2026-10-28T02:30:48.851510398Z",
"provider": "osv",
"references": [
"https://github.com/node-formidable/formidable/blob/d0fbec13edc8add54a1afb9ce1a8d3db803f8d47/CHANGELOG.md?plain=1#L10",
"https://github.com/zast-ai/vulnerability-reports/blob/main/formidable/file_upload/report.md",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/46xxx/CVE-2025-46653.json",
"https://nvd.nist.gov/vuln/detail/CVE-2025-46653",
"https://github.com/node-formidable/formidable/commit/022c2c5577dfe14d2947f10909d81b03b6070bf5"
],
"provider_metadata": {
"cwe_ids": [
"CWE-338"
],
"cna_assigner": "mitre",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/46xxx/CVE-2025-46653.json"
}
},
"related_cves": [
{
"value": "CVE-2025-46653",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 516905,
"published_at": "2025-04-26T00:00:00+00:00"
}