CVE-2025-46653
Description
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Debian Mixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Affected | — |
| sid | Fixed | 3.5.4+~cs11.10.5-1 |
| forky | Fixed | 3.5.4+~cs11.10.5-1 |
| bullseye | Affected | — |
| bookworm | Affected | — |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| npm | formidable | >=3.1.1-canary.20211030,<3.5.3 | 3.5.3 |
| npm | formidable | >=2.1.0,<2.1.3 | 2.1.3 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| node-formidable | formidable | {"startIncluding":"2.1.0","endExcluding":"3.5.3"} | 3.5.3 |
References
- https://github.com/node-formidable/formidable/blob/d0fbec13edc8add54a1afb9ce1a8d3db803f8d47/CHANGELOG.md?plain=1#L10
- https://github.com/node-formidable/formidable/commit/022c2c5577dfe14d2947f10909d81b03b6070bf5
- https://github.com/zast-ai/vulnerability-reports/blob/main/formidable/file_upload/report.md
- https://nvd.nist.gov/vuln/detail/CVE-2025-46653
- https://github.com/node-formidable/formidable/commit/37a3e89fca1ed68ec674a539f13aafd62221ddaa
- https://github.com/node-formidable/formidable
- https://www.npmjs.com/package/formidable/v/2.1.3
- https://www.npmjs.com/package/formidable/v/3.5.3
- https://security-tracker.debian.org/tracker/CVE-2025-46653
CWEs
CWE-338
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.