CVE-2025-64439 Details
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.
A remote code execution vulnerability has been identified in the LangGraph library, specifically within the JsonPlusSerializer component used for checkpointing. This issue is present in versions through 2.1.2. The vulnerability arises when the serializer deserializes payloads saved in the 'json' mode, which is a fallback for certain serialization errors. Exploitation occurs if an attacker can manipulate the application to save a malicious payload in this format, leading to the execution of arbitrary Python code during deserialization.
Users are advised to upgrade to LangGraph version 3.0.0 or later, which includes a patch for this vulnerability by restricting the deserialization of custom objects saved in the 'json' mode. In 'langgraph-api', any version 0.5 or later is also free of this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Nov 7, 2025CISA-ADP
Assessed Nov 7, 2025References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-502 | Deserialization of Untrusted Data | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| LangGraph SQLite Checkpoint | All versions |
CPE
Remediation
| |
| LangGraph CheckpointSaver | All versions |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Nov 7, 2025 | New CVE Received | [email protected] |