{"cve":"CVE-2026-7847","nvd":{"published":"2026-05-05T17:17:05.153","modified":"2026-07-24T08:10:00.150","status":"Deferred","description":"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_v4":{"vector":"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","score":1.2},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","score":2.6},"cwes":["CWE-310","CWE-330"],"references":["https://github.com/3em0/cve_repo/blob/main/Langchain-Chatchat/Vuln-3-Predictable-File-ID.md","https://github.com/chatchat-space/Langchain-Chatchat/","https://github.com/chatchat-space/Langchain-Chatchat/issues/5464","https://vuldb.com/submit/807796","https://vuldb.com/vuln/361126"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:33:55.586217763+00:00"},"epss":{"cve":"CVE-2026-7847","score":0.00235,"percentile":0.14476,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-jv4p-mhmp-69vw","url":"https://osv.dev/vulnerability/GHSA-jv4p-mhmp-69vw","summary":"Langchain-Chatchat Uses Insufficiently Random Values","modified":"2026-07-13T16:42:54.996285332Z","packages":[{"ecosystem":"PyPI","name":"langchain-chatchat","purl":"pkg:pypi/langchain-chatchat","ranges":["<=0.3.1.3"],"fixed":[]}]},{"id":"PYSEC-2026-2557","url":"https://osv.dev/vulnerability/PYSEC-2026-2557","summary":"Langchain-Chatchat Uses Insufficiently Random Values","modified":"2026-07-13T16:31:48.707561538Z","packages":[{"ecosystem":"PyPI","name":"langchain-chatchat","purl":"pkg:pypi/langchain-chatchat","ranges":["<=0.3.1.3"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}