CVE-2023-39631: Langchain

Critical severity, CVSS 9.8. EPSS: 1.6% chance of exploitation in the next 30 days.

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.

Affected products

• Langchain Langchain: version 0.0.245 only

Published 2023-09-01. Last modified 2026-06-17.