CVE-2025-46653: Node-Formidable Formidable

Low severity, CVSS 3.1. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Node-Formidable Formidable: from 2.1.0, before 3.5.3 (fixed in 3.5.3)

Published 2025-04-26. Last modified 2026-06-17.