CVE-2023-39631 Langchain vulnerable to arbitrary code execution via the evaluate function in the numexpr library

What is CVE-2023-39631?

CVE-2023-39631 is a critical code injection vulnerability in n/a, published on 1 Sep 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue in LanChain-ai Langchain v.0.0.245 allows a remote attacker to execute arbitrary code via the evaluate function in the numexpr library.

Weakness: CWE-94

Which versions are affected by CVE-2023-39631?

6 open source packages ship an affected version, including langchain and numexpr. It affects 1 product.

Products include Langchain Langchain.

How do I fix CVE-2023-39631?

Upgrade langchain to 0.0.308 or later.

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

Is CVE-2023-39631 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-39631 exists.

Other vulnerabilities in n/a

• CVE-2023-36281 langchain vulnerable to arbitrary code execution Critical 9.8
• CVE-2023-38860 LangChain vulnerable to arbitrary code execution Critical 9.8
• CVE-2023-38896 LangChain vulnerable to arbitrary code execution Critical 9.8
• CVE-2023-39659 LangChain vulnerable to arbitrary code execution Critical 9.8
• CVE-2023-36095 langchain Code Injection vulnerability Critical 9.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-f73w-4m7g-ch9x, PYSEC-2023-162, PYSEC-2023-163, ROOT-APP-PYPI-CVE-2023-39631.