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

Badges

👾 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.

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

References

https://vuldb.com/?id.314326
vdb-entry
https://vuldb.com/?ctiid.314326
signaturepermissions-required
https://vuldb.com/?submit.601161
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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