EUVD-2026-27392
GHSA-x229-w2j4-h748
CVSS VectorNVD
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
2DescriptionNVD
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.
AnalysisAI
Time-of-check time-of-use (TOCTOU) vulnerability in Langchain-Chatchat up to 0.3.1.3 allows authenticated local network attackers to manipulate file.filename arguments in the OpenAI-Compatible File Upload API, leading to integrity compromise through race condition exploitation. Publicly available exploit code exists, and the vendor has not responded to early disclosure notification despite proof-of-concept documentation.
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External POC / Exploit Code
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