Deserialization of Untrusted Data Affecting langgraph-checkpoint package, versions [,3.0.0)

langgraph-checkpoint is a library with base interfaces for LangGraph checkpoint savers.

Affected versions of this package are vulnerable to Deserialization of Untrusted Data via the JsonPlusSerializer deserialization process of payloads saved in the json serialization mode. An attacker can execute arbitrary code by supplying a maliciously crafted payload that is deserialized in the json mode, which supports constructor-style formats for custom objects.

Serialization is a process of converting an object into a sequence of bytes which can be persisted to a disk or database or can be sent through streams. The reverse process of creating object from sequence of bytes is called deserialization. Serialization is commonly used for communication (sharing objects between multiple hosts) and persistence (store the object state in a file or a database). It is an integral part of popular protocols like Remote Method Invocation (RMI), Java Management Extension (JMX), Java Messaging System (JMS), Action Message Format (AMF), Java Server Faces (JSF) ViewState, etc.

Deserialization of untrusted data (CWE-502) is when the application deserializes untrusted data without sufficiently verifying that the resulting data will be valid, thus allowing the attacker to control the state or the flow of the execution.

• GitHub Commit
• GitHub Release
• Vulnerable Code