Path Traversal in Chatchat-space Langchain-chatchat
CVE-2025-6853
A vulnerability classified as critical has been found in chatchat-space Langchain-Chatchat up to 0.3.1. This affects the function upload_temp_docs of the file /knowledge_base/upload_temp_docs of the component Backend. The manipulation of t…
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.006 (70.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Chatchat-space Langchain-chatchat — versions 0.3.0, 0.3.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- VDB-314325 | chatchat-space Langchain-Chatchat Backend upload_temp_docs path traversal (technical-description, Third Party Advisory, VDB Entry, vdb-entry)
- VDB-314325 | CTI Indicators (IOB, IOC, TTP, IOA) (signature, Permissions Required, permissions-required, VDB Entry)
- Submit #601155 | chatchat-space Langchain-Chatchat < v0.3.1 Path Traversal: '.../...//' (Third Party Advisory, VDB Entry, third-party-advisory)
- cna@vuldb.com (issue-tracking, Exploit, exploit, Issue Tracking)
Frequently asked questions
- What is CVE-2025-6853?
- CVE-2025-6853 is a medium-severity vulnerability in Chatchat-space Langchain-chatchat, classified under Path Traversal. CVSS score: 6.3/10. Published 2025-06-29.
- How severe is CVE-2025-6853?
- Medium severity. CVSS v3 base score is 6.3 out of 10.
- Is CVE-2025-6853 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.