Langchain-Chatchat has a Path Traversal vulnerability
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | langchain-chatchat | <= 0.3.1.3 | no fix |
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-6853
- https://github.com/chatchat-space/Langchain-Chatchat/issues/5352
- https://github.com/chatchat-space/Langchain-Chatchat
- https://vuldb.com/?ctiid.314325
- https://vuldb.com/?id.314325
- https://vuldb.com/?submit.601155
- https://pypi.org/project/langchain-chatchat
- https://github.com/advisories/GHSA-qmgv-j263-qr33
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L- Weakness (CWE)
CWE-22- Platform
- Python (PyPI)
- Package
langchain-chatchat- Disclosed
- 29.06.2025
- Updated
- 11.10.2026 13:19
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-1513 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-qmgv-j263-qr33 - CC BY 4.0
Vulnerability history: langchain-chatchat
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 6
- First → latest
- 06.2025 05.2026
- Without a fix
- 6
- Exploited in attacks
- 0
Severity breakdown
- Low 6
Disclosures per year
- 2025: 3
- 2026: 3
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Langchain-Chatchat has a Path Traversal vulnerability this entry
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