langchain_experimental (aka LangChain Experimental) in LangChain before 0.0.306 allows an attacker to bypass the CVE-2023-36258 fix and execute arbitrary code via __import__ in Python code, which is not prohibited by pal_chain/base.py.
https://thehackernews.com/2024/08/researchers-identify-over-20-supply.html
https://unit42.paloaltonetworks.com/langchain-vulnerabilities/
https://github.com/langchain-ai/langchain/commit/4c97a10bd0d9385cfee234a63b5bd826a295e483