CVE-2026-7846: fallo de gravedad baja en chatchat-space Langchain-Chatchat
chatchat-space Langchain-Chatchat OpenAI-Compatible File Upload API openai_routes.py files toctou
Publicada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
28Vexday Risk Score
Sin señal de explotación. Ella tiene prueba de concepto pública.
ssvc Attendcvss 2.1epss 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.
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
Productos afectados
chatchat-space · Langchain-ChatchatPoCs públicas encontradas — 1
cve_referencegithub.com/3em0/cve_repo/blob/main/Langchain-Chatchat/Vuln-2-Silent-File-Overwrite.mdno verificado⚠ Recursos públicos, para evaluar la exposición de sistemas que controlas o estás autorizado a probar. Prueba solo con autorización.
CVEs relacionadas — chatchat-space Langchain-Chatchat
En el mismo producto, de las más peligrosas a las menos.
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-2026-7847LOWchatchat-space Langchain-Chatchat Uploaded File openai_routes.py _get_file_id random valuesEPSS 0.2%
Referencias
https://github.com/3em0/cve_repo/blob/main/Langchain-Chatchat/Vuln-2-Silent-File-Overwrite.mdhttps://github.com/chatchat-space/Langchain-Chatchat/https://github.com/chatchat-space/Langchain-Chatchat/issues/5463https://vuldb.com/submit/807795https://vuldb.com/vuln/361125https://vuldb.com/vuln/361125/cti