CVE-2026-7847: Chatchat-Space Langchain-Chatchat

Low severity, CVSS 2.6. EPSS: 0.3% chance of exploitation in the next 30 days.

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 products

• Chatchat-Space Langchain-Chatchat: version 0.3.1.0 only; version 0.3.1.1 only; version 0.3.1.2 only; version 0.3.1.3 only

Published 2026-05-05. Last modified 2026-07-24.