Langchain-Chatchat Uses Insufficiently Random Values
A vulnerability was found in chatchat-space Langchain-Chatchat up to 0.3.1.3. The affected element is the function _get_file_id of the file libs/chatchat-server/chatchat/server/api_server/openai_routes.py of the component Uploaded File Handler. Performing a manipulation results in insufficiently random values. Access to the local network is required for this attack. The attack's complexity is rated as high. The exploitability is described as difficult. The exploit has been made public and could be used. The project was informed of the problem early through an issue report but has not responded yet.
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-2026-7847
- https://github.com/chatchat-space/Langchain-Chatchat/issues/5464
- https://github.com/3em0/cve_repo/blob/main/Langchain-Chatchat/Vuln-3-Predictable-File-ID.md
- https://github.com/chatchat-space/Langchain-Chatchat
- https://vuldb.com/submit/807796
- https://vuldb.com/vuln/361126
- https://vuldb.com/vuln/361126/cti
- https://pypi.org/project/langchain-chatchat
- https://github.com/advisories/GHSA-jv4p-mhmp-69vw
- CVSS vector
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N- Weakness (CWE)
CWE-330- Platform
- Python (PyPI)
- Package
langchain-chatchat- Disclosed
- 05.05.2026
- Updated
- 11.10.2026 14:17
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-2557 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-jv4p-mhmp-69vw - 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
-
Langchain-Chatchat Uses Insufficiently Random Values this entry
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