DEVSECOPSBAY · YA · KA
CLOUDFLARE R2 · DOCKER · CI/CD
Cloud Infrastructure, DevOps & CI/CD3 min read· Nov 3, 2026
Secure File Uploads: Magic-Byte Inspection & Signed Cloud Storage (R2/S3)
Why checking file extensions is dangerous, and how we verify binary signatures before storing files in private Cloudflare R2 buckets.
KA
Serkan Kaya
BAYAKA Founding Engineering