CVE-2023-39659: Langchain

Critical severity, CVSS 9.8. EPSS: 1.5% chance of exploitation in the next 30 days.

An issue in langchain langchain-ai v.0.0.232 and before allows a remote attacker to execute arbitrary code via a crafted script to the PythonAstREPLTool._run component.

Affected products

• Langchain Langchain: up to and including 0.0.232

Published 2023-08-15. Last modified 2026-06-17.