CVE-2025-64439

The record

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.

Affected packages

Related vulnerabilities

• GHSA-wwqv-p2pp-99h5 LangGraph Checkpoint affected by RCE in "json" mode of JsonPlusSerializer Same vulnerability
• GHSA-mhr3-j7m5-c7c9 LangGraph: BaseCache Deserialization of Untrusted Data may lead to Remote Code Execution Also affects langgraph-checkpoint
• CVE-2026-27794 LangGraph Checkpoint defines the base interface for LangGraph checkpointers. Also affects langgraph-checkpoint
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• CVE-2026-112081 A vulnerability was determined in hankcs HanLP up to 2.1.0-beta.64. CWE-502
• CVE-2026-96745 Deserialization of untrusted data in the command monitoring support of the MongoDB PHP… CWE-502
• CVE-2026-62107 Unauthenticated PHP Object Injection in Masteriyo - LMS <= 3.4.0 versions. CWE-502
• CVE-2026-62103 Unauthenticated PHP Object Injection in Everest Forms <= 3.6.0 versions. CWE-502