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v1.3.3

langflow-ai/langflowv1.3.3Jun 26, 2026by PawelPeczek-Roboflow

AI Summary

This release focuses on enhancing SAM video blocks, adding enterprise PLC reader/writer capabilities, and introducing a vLLM proxy backend for serving VLM fine-tunes. It also includes security fixes and new workflow blocks for visual search and tracklet recognition.

Key Highlights

  • feat: vLLM proxy backend — serve VLM fine-tunes via vLLM with dynamic LoRA
  • Add PLC Reader / Writer enterprise blocks (relay + direct EtherNet/IP & Modbus)
  • Add Roboflow visual search workflow block
  • Security: Fix missing Input Validation in UDP Message Parsing
  • Support rfdetr keypoint covariance matrix output

New Features

  • vLLM proxy backend with dynamic LoRA support
  • PLC Reader/Writer enterprise blocks
  • Roboflow visual search workflow block
  • tracklet recognition workflow blocks
  • rfdetr keypoint covariance matrix output support

Full Release Notes

## What's Changed
* Forward weight provider headers from SAM video blocks by @hansent in https://github.com/roboflow/inference/pull/2511
* [codex] Fix SAM2 cache fast paths by @hansent in https://github.com/roboflow/inference/pull/2520
* ENT-1069: Add PLC Reader / Writer enterprise blocks (relay + direct EtherNet/IP & Modbus) by @rvirani1 in https://github.com/roboflow/inference/pull/2514
* Make Rate Limiter cooldown_seconds visible without expanding additional properties by @Grantimus9 in https://github.com/roboflow/inference/pull/2513
* Security: Missing Input Validation in UDP Message Parsing by @tomaioo in https://github.com/roboflow/inference/pull/2471
* feat: vLLM proxy backend — serve VLM fine-tunes via vLLM with dynamic LoRA by @hansent in https://github.com/roboflow/inference/pull/2434
* Add Roboflow visual search workflow block by @balthazur in https://github.com/roboflow/inference/pull/2522
* fix(workflows): transform oriented box corners in perspective_correction by @kounelisagis in https://github.com/roboflow/inference/pull/2521
* Preserve zero source ID in workflow metadata by @grzegorz-roboflow in https://github.com/roboflow/inference/pull/2507
* Support rfdetr keypoint covariance matrix output by @sergii-bond in https://github.com/roboflow/inference/pull/2524
* Fix typo, 404, kapa widget by @Erol444 in https://github.com/roboflow/inference/pull/2525
* changes for treating color as with rgb_color instead of string by @rafel-roboflow in https://github.com/roboflow/inference/pull/2249
* Make Modal region/cloud/routing env-driven for EU residency by @imbgar-roboflow in https://github.com/roboflow/inference/pull/2474
* Add changes to fix CUDA version acquisition by @PawelPeczek-Roboflow in https://github.com/roboflow/inference/pull/2515
* Fix/tests by @grzegorz-roboflow in https://github.com/roboflow/inference/pull/2526
* Add tracklet recognition workflow blocks by @Erol444 in https://github.com/roboflow/inference/pull/2497
* Revert "Add tracklet recognition workflow blocks" by @PawelPeczek-Roboflow in https://github.com/roboflow/inference/pull/2527
* Fix undefined behavior of the api given serverless auth fail by @PawelPeczek-Roboflow in https://github.com/roboflow/inference/pull/2528
* Revert "Fix undefined behavior of the api given serverless auth fail" by @PawelPeczek-Roboflow in https://github.com/roboflow/inference/pull/2529

## New Contributors
* @tomaioo made their first contribution in https://github.com/roboflow/inference/pull/2471
* @imbgar-roboflow made their first contribution in https://github.com/roboflow/inference/pull/2474

**Full Changelog**: https://github.com/roboflow/inference/compare/v1.3.2...v1.3.3