Path Traversal Vulnerability in Langchain-Chatchat by chatchat-space
CVE-2025-6854

5.3MEDIUM

Key Information:

Vendor: Chatchat-space
Status: Langchain-chatchat
Vendor: CVE Published:; 29 June 2025

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👾 Exploit Exists🟡 Public PoC

What is CVE-2025-6854?

A path traversal vulnerability exists in Langchain-Chatchat versions up to 0.3.1, which allows an attacker to manipulate file paths through the /v1/files?purpose=assistants endpoint. This can lead to unauthorized access to file system resources. The remote accessibility of this exploit raises significant security concerns, and it has been publicly disclosed, indicating an urgent need for affected users to apply security measures.

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Affected Version(s)

Langchain-Chatchat 0.3.0

Langchain-Chatchat 0.3.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-6854 - Proof of Concept