# Pattern: Secure File Upload Pipeline

Status: seed
Readiness target: RL3 production
Primary owners: product repos, artifact-store, NetKingdom
Genesis family: Application/API security

## Problem

User-supplied files can carry malware, parser attacks, data leakage, and
unsafe object-storage exposure.

## Context

Use this pattern for tenant file uploads, artifact ingestion, document
processing, media upload, and user-controlled object storage paths.

## Forces

- Users need convenient uploads.
- Uploaded files should not be trusted until processed.
- Scanning, classification, and transformation may be asynchronous.
- Object access must remain tenant and authorization scoped.

## Solution

Route uploads through a controlled pipeline: accept to quarantine,
record metadata, scan/classify, transform if needed, promote to trusted
storage, and serve through authorized access paths.

## Verification

- Raw uploads land in quarantine or untrusted storage.
- Scanning and classification results are recorded before promotion.
- Access to uploaded objects uses tenant and object-level authorization.
- Malicious or unsupported files fail safely.

## Related Patterns

- Object-Level Authorization Check.
- STS Credential Vending.
- Tenant Data Partitioning.
- Central Audit Ledger.