If you have stumbled upon the string curl-url-file-3A-2F-2F-2F in log files, error messages, or penetration testing reports, you are not looking at random gibberish. You are looking at a .
The primary danger is not the tool itself, but the lack of "sandboxing" in many environments. If an application has excessive permissions, a simple curl command can expose cryptographic keys, configuration files containing database passwords, or user data. This is why many modern security frameworks recommend disabling the file protocol in production environments unless explicitly required. Conclusion curl-url-file-3A-2F-2F-2F
That seems to represent a URI scheme like curl-url-file:/// (perhaps a custom or pseudo-protocol for some tool or script). or penetration testing reports
Example attack payload: curl "file:///etc/passwd" encoded as curl-url-file-3A-2F-2F-2Fetc-2Fpasswd configuration files containing database passwords