# Open WebUI v0.6.39 — Release & Upgrade Intelligence
- **Product:** Open WebUI (https://openwebui.com)
- **Version:** v0.6.39
- **Released:** Nov 25, 2025
- **Impact Score:** 7/10
- **Breaking Changes:** Source flagged
- **Canonical Analysis:** https://changelogs.us/open-webui/updates/v0.6.39/

## Executive Summary (TL;DR)
Open WebUI v0.6.39. Source highlight: [0.6.39] - 2025-11-25

## Breaking Changes & Deprecations
- - 🔧 BREAKING: Docling configuration has been consolidated from individual environment variables into a single "DOCLING_PARAMS" JSON configuration and now supports API key authentication via "DOCLING_API_KEY", requiring users to migrate existing Docling settings to the new format. [#16841](https://github.com/open-webui/open-webui/issues/16841), [#19427](https://github.com/open-webui/open-webui/pull/19427)

## New Features
- 💬 A user list modal was added to channels, displaying all users with access and featuring search, sorting, and pagination capabilities. Commit
- 💬 Channel navigation now displays the total number of users with access to the channel. Commit
- 🔌 Tool servers and MCP connections now support function name filtering, allowing administrators to selectively enable or block specific functions using allow/block lists. Commit
- ⚡ A toggle to disable parallel embedding processing was added via "ENABLE_ASYNC_EMBEDDING", allowing sequential processing for rate-limited or resource-constrained local embedding setups. #19444
- 🔄 Various improvements were implemented across the frontend and backend to enhance performance, stability, and security.
- 🌐 Localization improvements were made for German (de-DE) and Portuguese (Brazil) translations.

## Bug Fixes
- 📝 Inline citations now render correctly within markdown lists and nested elements instead of displaying as "undefined" values. #19452
- 👥 Group member selection now works correctly without randomly selecting other users or causing the user list to jump around. #19426
- 👥 Admin panel user list now displays the correct total user count and properly paginates 30 items per page after fixing database query issues with group member joins. #19429
- 🔍 Knowledge base reindexing now works correctly after resolving async execution chain issues by implementing threadpool workers for embedding operations. #19434
- 🖼️ OpenAI image generation now works correctly after fixing a connection adapter error caused by incorrect URL formatting. #19435