chatchat-space Langchain-Chatchat — Auth Bypass (CVE-2026-7844)
Date: 2026-05
Attack vector: auth-bypass
Category: vulnerability-disclosure
Severity: Medium
CVE: CVE-2026-7844
CVE-2026-7845
CVE-2026-7846
CVE-2026-7847
CWE: CWE-287
CWE-306
CWE-310
CWE-327
CWE-328
CWE-330
CWE-362
CWE-367
CVSS: 6.3 (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

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.


Mitigations:

Architectural layers (MAESTRO):