CVE-2026-7846Low· 2.6▾ SunlitLangchain-Chatchat has a Race Condition in its OpenAI-Compatible File Upload API
▾ Sunlit zone — Low / medium · no exploitation signal
impact 14.3 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 13.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
Last analysed / modified upstream
0.2%
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.
langchain-chatchat <= 0.3.1.3Refer to the advisory for the patched release.
Connected by shared product, vendor, weakness, or advisory.
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