Security Bulletin: LangChain Serialization Injection Vulnerability in dumps()/dumpd() (Fixed in 0.3.81 / 1.2.5) affects watsonx.data

Summary A serialization injection vulnerability in LangChain's dumps and dumpd functions pre-0.3.81 / 1.2.5 allows user-controlled data with 'lc' keys to be deserialized as objects. This issue is fixed in versions 0.3.81 and 1.2.5. This can affect watsonx.data. Vulnerability Details...

CVE-2025-68665 LangChain serialization injection vulnerability enables secret extraction

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...

LangChain serialization injection vulnerability enables secret extraction in dumps/loads APIs

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...

PT-2025-52859

Name of the Vulnerable Software and Affected Versions: LangChain versions prior to 0.3.81 and 1.2.5 Description: A serialization injection vulnerability exists in LangChain's dumps and dumpd functions. These functions do not properly escape dictionaries containing 'lc' keys when serializing data...