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87 changes: 87 additions & 0 deletions release-notes/comfyui/v0.3.40.mdx
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```mdx
---
title: 'ComfyUI v0.3.40'
description: 'Release notes for ComfyUI version 0.3.40 including new nodes, security updates, and improvements'
---

# ComfyUI v0.3.40

<Note>
This release includes contributions from three new contributors to the project and includes multiple template version bumps for improved stability.
</Note>

## New Features

<CodeGroup>

<Update>
### Node Additions
- **ImageStitch Node** - New functionality to concatenate images
- **GetImageSize Node** - Added capability to retrieve image dimensions with batch support
- **Regex Replace Node** - New node for performing regex substitution operations
</Update>

<Update>
### Interface Improvements
- **Help Menu** - Introduced in NodeLibrarySidebarTab for improved user guidance
- **Custom Node Support** - Added ability to read pyproject.toml from custom nodes
</Update>

</CodeGroup>

## Improvements

<CodeGroup>

<Update>
### Frontend & Performance
- Multiple frontend updates (v1.21.0 through v1.21.7) with various enhancements
- Implemented fused multiply-add pointwise operations in chroma for better efficiency
</Update>

<Update>
### API Enhancements
- Improved handling of lists of tensors for models
- Better support for custom comfy-api-base with subpath functionality
- Added API nodes documentation to readme
</Update>

<Update>
### Platform Support
- Improved ROCm version handling for better feature enablement
</Update>

</CodeGroup>

## Security Updates

<Warning>
Enhanced security fix for potential XSS vulnerability on /view endpoint
</Warning>

## Bug Fixes

<CodeGroup>

<Update type="fixed">
### Core Fixes
- Replaced deprecated Pillow API call (Image.ANTIALIAS)
- Multiple frontend bug fixes through version updates
- Various style and formatting improvements
</Update>

</CodeGroup>

## Other Changes

<CodeGroup>

<Update type="changed">
### Maintenance
- Cleanup of BFL API nodes for Kontext [pro] and [max]
- Updated issue templates to include custom node testing requirements
- Code ownership updates and documentation improvements
</Update>

</CodeGroup>
```
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