multipart-v0.8.0

asheshgoplani/agent-deckmultipart-v0.8.0Jun 21, 2026by JohnTitor

AI Summary

This release adds testing utilities for multipart payloads and hardens the parser to prevent unbounded memory growth on malformed input.

Key Highlights

Added multi-field multipart payload builders to `actix_multipart::test`
Added `MultipartForm` support for `Option<Vec<T>>` fields
Bounded internal multipart parser buffering (64KB cap) to prevent unbounded growth
Fixed user-triggerable panic when parsing multipart boundaries
Minimum supported Rust version (MSRV) updated to 1.88

Breaking Changes

Bounded internal multipart parser buffering (unbounded growth is now capped at 64KB).

New Features

Multi-field payload builders in test module
Support for `Option<Vec<T>>` fields in `MultipartForm`
Configurable buffer limit via `MultipartConfig::buffer_limit`

Full Release Notes

## 0.8.0

- Add multi-field multipart payload builders to `actix_multipart::test`. [#3575]
- Add `MultipartForm` support for `Option<Vec<T>>` fields. [#3577]
- Bound internal multipart parser buffering to prevent unbounded memory growth on malformed bodies.
  - behavior change notice: There's now a cap for buffering (64KB). It can be changed with `MultipartConfig::buffer_limit`.
- Fix user-triggerable panic when parsing multipart boundaries.
- Minimum supported Rust version (MSRV) is now 1.88.
- Update `rand` dependency to `0.10`.

[#3577]: https://github.com/actix/actix-web/pull/3577
[#3575]: https://github.com/actix/actix-web/issues/3575