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.
{ "nvd_published_at": "2025-04-26T21:15:14Z", "cwe_ids": [ "CWE-338" ], "severity": "LOW", "github_reviewed": true, "github_reviewed_at": "2025-04-29T14:07:17Z" }