CVE-2026-7847: low-severity vulnerability in chatchat-space Langchain-Chatchat
chatchat-space Langchain-Chatchat Uploaded File openai_routes.py _get_file_id random values
Published · Updated
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28Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 2.1epss 0.2%
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.
CVSS:4.0/AV:A/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
Affected products
chatchat-space · Langchain-Chatchatpublic PoCs found — 1
cve_referencegithub.com/3em0/cve_repo/blob/main/Langchain-Chatchat/Vuln-3-Predictable-File-ID.mdunverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — chatchat-space Langchain-Chatchat
In the same product, most dangerous first.
CVE-2026-75128CRITICALLangchain-Chatchat through 0.3.1.3 Unauthenticated RCE via /tools/call EndpointEPSS 2.2%CVE-2025-6853MEDIUMchatchat-space Langchain-Chatchat Backend upload_temp_docs path traversalEPSS 0.6%CVE-2025-6855MEDIUMchatchat-space Langchain-Chatchat file path traversalEPSS 0.6%CVE-2025-6854MEDIUMchatchat-space Langchain-Chatchat files path traversalEPSS 0.6%CVE-2026-7844MEDIUMchatchat-space Langchain-Chatchat Compatible File Service openai_routes.py delete_file missing authenticationEPSS 0.3%CVE-2026-7846LOWchatchat-space Langchain-Chatchat OpenAI-Compatible File Upload API openai_routes.py files toctouEPSS 0.2%
References
https://github.com/3em0/cve_repo/blob/main/Langchain-Chatchat/Vuln-3-Predictable-File-ID.mdhttps://github.com/chatchat-space/Langchain-Chatchat/https://github.com/chatchat-space/Langchain-Chatchat/issues/5464https://vuldb.com/submit/807796https://vuldb.com/vuln/361126https://vuldb.com/vuln/361126/cti