CVE-2026-7846 LOW

CVE-2026-7846: chatchat-space Langchain-Chatchat OpenAI-Compatible File Upload API openai_routes.py files toctou

Vendor Chatchat-Space
Product Langchain-Chatchat
Weakness CWE-367
Published May 5, 2026
Last update May 5, 2026

CVSS base score

2.1/10
Attack vector Adjacent
Attack complexity High
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:A/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

A vulnerability has been found in chatchat-space Langchain-Chatchat up to 0.3.1.3. Impacted is the function files of the file libs/chatchat-server/chatchat/server/api_server/openai_routes.py of the component OpenAI-Compatible File Upload API. Such manipulation of the argument file.filename leads to time-of-check time-of-use. Access to the local network is required for this attack to succeed. The attack requires a high level of complexity. The exploitability is considered difficult. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Key dates

02Disclosure timeline

May 5, 2026 CVE published
May 5, 2026 Record updated