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.

CVSS Scores

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Meta Information

Published

2025-11-07

Last Modified

2025-11-12

Generated

2026-07-06

AI Q&A

2025-11-07

EPSS Evaluated

2026-07-05

NVD

CVE-2025-64439

EUVD

EUVD-2025-37934

Affected Vendors & Products

Vendor	Product	Version / Range
langchain-ai	langgraph-api	0.5
langchain-ai	langgraph-checkpoint	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-502	The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Attack-Flow Graph

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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