| Component | LangChain |
| Severity | medium (CVSS 6.3) |
| CVSS vector | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
| Published (NVD) | 2026-05-05 |
| Last modified | 2026-07-24 |
| Affected versions | <= 0.3.1.3 read from the advisory text: NVD has not published CPE data yet |
| Fixed in | see the vendor advisory |
| Weakness | CWE-287CWE-306 |
| CISA KEV | not listed |
NVD description
A vulnerability was detected in chatchat-space Langchain-Chatchat up to 0.3.1.3. This vulnerability affects the function files/list_files/retrieve_file/retrieve_file_content/delete_file of the file libs/chatchat-server/chatchat/server/api_server/openai_routes.py of the component Compatible File Service. The manipulation results in missing authentication. The attacker must have access to the local network to execute the attack. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
What to do
- NVD lists no fixed version yet: follow the vendor advisory below and keep LangChain off the public internet until a fix ships.
- Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-7844
- https://github.com/3em0/cve_repo/blob/main/Langchain-Chatchat/Vuln-4-Missing-Auth-File-Endpoints.md
- https://github.com/chatchat-space/Langchain-Chatchat/
- https://github.com/chatchat-space/Langchain-Chatchat/issues/5465
- https://vuldb.com/submit/807790
- https://vuldb.com/vuln/361123
- https://vuldb.com/vuln/361123/cti
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