CVE-2024-8309

CRITICAL LAB

langchain-ai/langchain <0.2.5 - SQL Injection

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2024-8309. PoCs published by liadlevy.

AI-analyzed exploit summary This repository demonstrates a proof-of-concept for CVE-2024-8309, a prompt injection vulnerability in Langchain's `GraphCypherQAChain` class that allows SQL injection in Neo4j databases. The PoC includes a backend (FastAPI) and frontend (Streamlit) to interact with Neo4j, showcasing how malicious Cypher queries can be executed.

Description

A vulnerability in the GraphCypherQAChain class of langchain-ai/langchain version 0.2.5 allows for SQL injection through prompt injection. This vulnerability can lead to unauthorized data manipulation, data exfiltration, denial of service (DoS) by deleting all data, breaches in multi-tenant security environments, and data integrity issues. Attackers can create, update, or delete nodes and relationships without proper authorization, extract sensitive data, disrupt services, access data across different tenants, and compromise the integrity of the database.

Exploits (1)

nomisec WORKING POC 3 stars
by liadlevy · poc
https://github.com/liadlevy/CVE-2024-8309

This repository demonstrates a proof-of-concept for CVE-2024-8309, a prompt injection vulnerability in Langchain's `GraphCypherQAChain` class that allows SQL injection in Neo4j databases. The PoC includes a backend (FastAPI) and frontend (Streamlit) to interact with Neo4j, showcasing how malicious Cypher queries can be executed.

Classification
Working Poc 95%
Attack Type
Sqli
Complexity
Moderate
Reliability
Reliable
Target: Langchain (GraphCypherQAChain) with Neo4j
No auth needed
Prerequisites: Access to a vulnerable Langchain setup with Neo4j integration · Ability to send crafted queries to the API endpoint
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Scores

CVSS v3 9.8
EPSS 0.0200
EPSS Percentile 84.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Lab Environment

COMMUNITY
Community Lab
docker pull neo4j:5.3

Details

CWE
CWE-74 CWE-89
Status published
Products (3)
langchain/langchain 0.2.5
pypi/langchain 0 - 0.2.0PyPI
pypi/langchain-community 0.2.0 - 0.2.19PyPI
Published Oct 29, 2024
Tracked Since Feb 18, 2026