CVE-2025-64439
Severity CVSS v4.0:
HIGH
Type:
CWE-502
Deserialization of Untrusted Dat
Publication date:
07/11/2025
Last modified:
12/11/2025
Description
LangGraph SQLite Checkpoint is an implementation of LangGraph CheckpointSaver that uses SQLite DB (both sync and async, via aiosqlite). In versions 2.1.2 and below, the JsonPlusSerializer (used as the default serialization protocol for all checkpointing) contains a Remote Code Execution (RCE) vulnerability when deserializing payloads saved in the "json" serialization mode. By default, the serializer attempts to use "msgpack" for serialization. However, prior to version 3.0 of the checkpointer library, if illegal Unicode surrogate values caused serialization to fail, it would fall back to using the "json" mode. This issue is fixed in version 3.0.0.
Impact
Base Score 4.0
7.40
Severity 4.0
HIGH
References to Advisories, Solutions, and Tools
- https://github.com/langchain-ai/langgraph/blob/c5744f583b11745cd406f3059903e17bbcdcc8ac/libs/checkpoint/langgraph/checkpoint/serde/jsonplus.py
- https://github.com/langchain-ai/langgraph/commit/c5744f583b11745cd406f3059903e17bbcdcc8ac
- https://github.com/langchain-ai/langgraph/releases/tag/checkpoint%3D%3D3.0.0
- https://github.com/langchain-ai/langgraph/security/advisories/GHSA-wwqv-p2pp-99h5