🛡️ Sentinel: [HIGH] Fix unvalidated file uploads in presigned URL generation#146
🛡️ Sentinel: [HIGH] Fix unvalidated file uploads in presigned URL generation#146
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…eration - Updated `app/api/upload/presigned/route.ts` to use centralized `validateFile` logic. - Applied `ALLOWED_GENERAL_TYPES` and `MAX_GENERAL_SIZE` constants to restrict file extensions and MIME types. - Fixed vulnerability allowing arbitrary and dangerous file uploads to bypass client-side checks and receive valid storage presigned URLs. - Documented findings in `.jules/sentinel.md`. Co-authored-by: xb1g <70068561+xb1g@users.noreply.github.com>
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🚨 Severity: HIGH
💡 Vulnerability: The
/api/upload/presignedendpoint responsible for generating storage upload URLs manually validated only file size, omitting critical file extension and MIME type validation. Attackers could bypass client constraints to request valid signatures to upload executables or arbitrary payloads directly to the storage bucket.🎯 Impact: Risk of distributing malware, hosting executable content, and bypassing platform usage guidelines.
🔧 Fix: Imported
validateFilefrom@/lib/constants/uploadand enforced standardized MIME type checks and theDANGEROUS_EXTENSIONSdeny list before issuing presigned URLs.✅ Verification: Verified fix through local linting, testing suite (
pnpm test), and codebase static checks. Journaled critical learning in.jules/sentinel.md.PR created automatically by Jules for task 7436328136503941214 started by @xb1g