Secure File Uploads in Rails: Virus Scanning, MIME, and S3 Gotchas
1 min read
Uploads are malware, PII, and storage bills waiting to happen. This is the checklist we use for Rails + S3 (or compatible) in regulated-ish environments.
What you'll learn
- MIME and extension traps
- Size limits and signed URLs
- Async scanning before files become “public enough”
Next steps
Never trust the browser’s Content-Type alone.