Langchain\/Core vulnerabilities

1 vulnerability

Known vulnerabilities in Langchain\/Core, newest first, with CVSS severity, EPSS, KEV listings, ransomware use and the affected versions.

9.1CVE-2025-68665chainguardkibana-8.17+29
EPSS score
0.79%
LangChain is a framework for building LLM-powered applications. Prior to @langchain/core versions 0.3.80 and 1.1.8, and prior to langchain versions 0.3.37 and 1.2.3, a serialization injection vulnerability exists in LangChain JS's toJSON() method (and subsequently when string-ifying objects using JSON.stringify(). The method did not escape objects with 'lc' keys when serializing free-form data in kwargs. The 'lc' key is used internally by LangChain to mark serialized objects. When user-controlled data contains this key structure, it is treated as a legitimate LangChain object during deserialization rather than plain user data. This issue has been patched in @langchain/core versions 0.3.80 and 1.1.8, and langchain versions 0.3.37 and 1.2.3