LangGraph SQLite Checkpoint is an implementation of LangGraph CheckpointSaver that uses SQLite DB (both sync and async, via aiosqlite). In versions 4.1.0 and prior, the JsonPlusSerializer can reconstruct Python objects from JSON checkpoint payloads. Under conditions where someone could modify checkpoint bytes at rest in the backing store, the deserialization path could reconstruct objects beyond what the application expects, which could in turn result in code execution at checkpoint load time. This is a defense-in-depth issue. The affected behavior is reachable only when checkpoint bytes at rest in the backing store can be modified by an unauthorized party. In most deployments that prerequisite already implies a serious incident; the additional concern is turning "checkpoint-store write access" into code execution in the application runtime. This issue has been fixed in version 4.1.1.
History

Tue, 16 Jun 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 16 Jun 2026 20:00:00 +0000

Type Values Removed Values Added
First Time appeared Langchain-ai
Langchain-ai langgraph
Langchain-ai langgraph-checkpoint
Vendors & Products Langchain-ai
Langchain-ai langgraph
Langchain-ai langgraph-checkpoint

Tue, 16 Jun 2026 18:30:00 +0000

Type Values Removed Values Added
Description LangGraph SQLite Checkpoint is an implementation of LangGraph CheckpointSaver that uses SQLite DB (both sync and async, via aiosqlite). In versions 4.1.0 and prior, the JsonPlusSerializer can reconstruct Python objects from JSON checkpoint payloads. Under conditions where someone could modify checkpoint bytes at rest in the backing store, the deserialization path could reconstruct objects beyond what the application expects, which could in turn result in code execution at checkpoint load time. This is a defense-in-depth issue. The affected behavior is reachable only when checkpoint bytes at rest in the backing store can be modified by an unauthorized party. In most deployments that prerequisite already implies a serious incident; the additional concern is turning "checkpoint-store write access" into code execution in the application runtime. This issue has been fixed in version 4.1.1.
Title LangGraph Checkpoint: Unsafe JSON deserialization in checkpoint loading
Weaknesses CWE-502
CWE-913
References
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-06-16T18:42:07.221Z

Reserved: 2026-05-22T19:39:05.357Z

Link: CVE-2026-48775

cve-icon Vulnrichment

Updated: 2026-06-16T18:41:10.319Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-06-16T19:16:58.880

Modified: 2026-06-16T20:46:19.370

Link: CVE-2026-48775

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-16T20:00:04Z