LangGraph SQLite Checkpoint — Rce (CVE-2025-64439)
Date: 2025-11
Attack vector: rce
Category: vulnerability-disclosure
Severity: Medium
CVE: CVE-2025-64439
CWE: CWE-502

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.


Mitigations:

Architectural layers (MAESTRO):