v12.1.0 v11.2.6
medium risk
nestjs/nestSep 23, 2026 → Sep 23, 20260 days between releases
What's New
Security fix for Multer and changed error mapping logic.
Breaking Changes
- Error mapping now uses error codes instead of messages, potentially affecting error handling logic.
Improvements
- Updated Multer dependency to v2.4.0 for security.
- Refined error handling to use error codes.
Bug Fixes
- Unexpected file fields now correctly return 400 instead of 500.
Upgrade Notes
Review error handling code as error mapping logic has changed. The multer dependency has been updated for security.
The Two Releases
v12.1.0
Sep 23, 2026· 29 days ago
This release focuses on stabilizing core functionality, improving microservices reliability, and introducing new security and utility features like CSRF protection, built-in cookies, and file upload support for Fastify.
Full release notesv11.2.6
v11.2.6
Sep 23, 2026· 29 days ago
This release updates the @nestjs/platform-express package to address a security vulnerability. It also refines error handling logic by mapping multer errors by code, ensuring unexpected file fields return 400 instead of 500.
Full release notes