{"cve":"CVE-2025-6855","nvd":{"published":"2025-06-29T09:15:24.290","modified":"2026-06-17T10:02:42.077","status":"Analyzed","description":"A vulnerability, which was classified as critical, has been found in chatchat-space Langchain-Chatchat up to 0.3.1. This issue affects some unknown processing of the file /v1/file. The manipulation of the argument flag leads to path traversal. The exploit has been disclosed to the public and may be used.","cvss_v4":{"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","score":2.0},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-22"],"references":["https://github.com/chatchat-space/Langchain-Chatchat/issues/5354","https://vuldb.com/?ctiid.314327","https://vuldb.com/?id.314327","https://vuldb.com/?submit.601162"],"products":["chatchat-space:langchain-chatchat"],"source":"nvd","synced_at":"2026-10-19T22:03:23.287444849+00:00"},"epss":{"cve":"CVE-2025-6855","score":0.0067,"percentile":0.51998,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-f823-phmg-x5fr","url":"https://osv.dev/vulnerability/GHSA-f823-phmg-x5fr","summary":"Langchain-Chatchat vulnerable to path traversal","modified":"2026-07-07T17:56:13.892011780Z","packages":[{"ecosystem":"PyPI","name":"langchain-chatchat","purl":"pkg:pypi/langchain-chatchat","ranges":["<=0.3.1"],"fixed":[]}]},{"id":"PYSEC-2026-1512","url":"https://osv.dev/vulnerability/PYSEC-2026-1512","summary":"Langchain-Chatchat vulnerable to path traversal","modified":"2026-07-07T17:47:16.714150398Z","packages":[{"ecosystem":"PyPI","name":"langchain-chatchat","purl":"pkg:pypi/langchain-chatchat","ranges":["<=0.3.1"],"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."]}