PT-2026-53461

Summary A serialization injection vulnerability exists in LangChain's dumps and dumpd functions. The functions do not escape dictionaries with 'lc' keys when serializing free-form dictionaries. The 'lc' key is used internally by LangChain to mark serialized objects. When user-controlled data...

CVE-2025-68664

LangChain is a framework for building agents and LLM-powered applications. Prior to versions 0.3.81 and 1.2.5, a serialization injection vulnerability exists in LangChain's dumps and dumpd functions. The functions do not escape dictionaries with 'lc' keys when serializing free-form dictionaries...