CVE-2023-39659 LangChain vulnerable to arbitrary code execution

Critical 9.8 Published 15 Aug 2023 Updated 8 Oct 2024

Remote attackers can execute arbitrary code via crafted scripts in the PythonAstREPLTool component of the LangChain library.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2023-39659?

CVE-2023-39659 is a critical code injection vulnerability in n/a, published on 15 Aug 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-74

Which versions are affected by CVE-2023-39659?

3 open source packages ship an affected version, including langchain. It affects 1 product.

Package	Affected	Fixed in
`langchain` PyPI	All versions	`0.0.233`
`langchain` PyPI	All versions	`0.0.325`
`langchain` PyPI	All versions	`0.0.325`

Products include Langchain Langchain.

How do I fix CVE-2023-39659?

Upgrade langchain to a fixed version for your release line: 0.0.233 or 0.0.325.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2023-39659 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-39659 exists.

Sources

Also known as GHSA-prgp-w7vf-ch62, PYSEC-2023-147.