CVE-2025-6853

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

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 the argument flag leads to path traversal. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-22

Affected software

Vendor	Product	Versions
chatchat-space	Langchain-Chatchat	0.3.0; 0.3.1

References

https://github.com/chatchat-space/Langchain-Chatchat/issues/5352Exploit, Issue Tracking
https://vuldb.com/?ctiid.314325Permissions Required, VDB Entry
https://vuldb.com/?id.314325Third Party Advisory, VDB Entry
https://vuldb.com/?submit.601155Third Party Advisory, VDB Entry
https://github.com/chatchat-space/Langchain-Chatchat/issues/5352Exploit, Issue Tracking

Timeline

Published: Jun 29, 2025
Last modified: Jun 17, 2026
NVD status: Analyzed

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