---
title: Rust SDK 0.12.1
summary: null
url: https://www.fastly.com/documentation/reference/changes/2026/04/rust-sdk-0.12.1
---

- Adjust the documentation around the `for_grpc` flag on backends to note
  current requirements and stability levels.
- Add `allowed_malformed_query_params` as an option for Image Optimizer
  requests.