GHSA-GJJR-63X4-V8CQ langchain_experimental vulnerable to arbitrary code execution via PALChain in the python exec method

langchainexperimental 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 palchain/base.py...