CVE-2025-64439
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-11-07

Last updated on: 2025-11-12

Assigner: GitHub, Inc.

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.
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Meta Information
Published
2025-11-07
Last Modified
2025-11-12
Generated
2026-06-16
AI Q&A
2025-11-07
EPSS Evaluated
2026-06-15
NVD
CVE-2025-64439
EUVD
EUVD-2025-37934
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
langchain-ai langgraph-api 0.5
langchain-ai langgraph-checkpoint *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-502 The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
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Executive Summary

This vulnerability is a Remote Code Execution (RCE) issue in the LangGraph SQLite Checkpoint library versions 2.1.2 and below. It occurs in the JsonPlusSerializer used for deserializing payloads saved in the "json" serialization mode. Normally, the serializer uses "msgpack" mode, but if serialization fails due to illegal Unicode surrogate values, it falls back to "json" mode, which is vulnerable. This fallback allows an attacker to execute arbitrary code during deserialization. The issue is fixed in version 3.0.0.

Impact Analysis

This vulnerability can allow an attacker to execute arbitrary code remotely on systems using vulnerable versions of the LangGraph SQLite Checkpoint library. This can lead to unauthorized control over the affected system, potentially resulting in data theft, system compromise, or disruption of services.

Mitigation Strategies

Upgrade the LangGraph CheckpointSaver library to version 3.0.0 or later, as this version fixes the Remote Code Execution vulnerability related to the JsonPlusSerializer's fallback to "json" serialization mode. Avoid using versions 2.1.2 and below.

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