LowVulnerability
CVE-2026-7846: Langchain-Chatchat time-of-check time-of-use in file upload API
- Source
- NVD(opens in a new tab)
- Identifier
- CVE-2026-7846
- Published
- Record updated
- Affected
- langchain-chatchat <= 0.3.1.3
- Fixed in
- No fixed version was stated when the source was last read.
- Known exploitation
- Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
- EPSS
- 0.2%
Summary
CVE-2026-7846 affects chatchat-space Langchain-Chatchat up to 0.3.1.3, specifically the files function in libs/chatchat-server/chatchat/server/api_server/openai_routes.py within the OpenAI-Compatible File Upload API. Manipulating the argument file.filename leads to a time-of-check time-of-use flaw. Exploitation requires local network access and a high level of complexity, and the exploit is public. The project was notified early through an issue report but has not responded.
Mitigation
The source does not state a fix yet. Check the original advisory for updates.
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