# LangChain langchain==1.4.2 — Release & Upgrade Intelligence
- **Product:** LangChain (https://langchain.com)
- **Version:** langchain==1.4.2
- **Released:** Sep 18, 2026
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/langchain/updates/langchain-1.4.2/

## Executive Summary (TL;DR)
LangChain langchain==1.4.2. Source highlight: Changes since langchain==1.4.1