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CVE-2025-64439
Good to know:
Date: November 7, 2025
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.
Severity Score
Related Resources (7)
Severity Score
Weakness Type (CWE)
Deserialization of Untrusted Data
CWE-502Top Fix
Upgrade Version
Upgrade to version langgraph-checkpoint - 3.0.0;langgraph-checkpoint - 3.0.0;langgraph-checkpoint-sqlite - 3.0.0;langgraph-checkpoint-sqlite - 3.0.0;https://github.com/langchain-ai/langgraph.git - checkpoint==3.0.0;https://github.com/langchain-ai/langgraph.git - checkpointsqlite==3.0.0
CVSS v3.1
| Base Score: |
|
|---|---|
| Attack Vector (AV): | NETWORK |
| Attack Complexity (AC): | LOW |
| Privileges Required (PR): | HIGH |
| User Interaction (UI): | NONE |
| Scope (S): | UNCHANGED |
| Confidentiality (C): | HIGH |
| Integrity (I): | HIGH |
| Availability (A): | NONE |