{"id":"CVE-2026-75128","revision":null,"records":[{"revision":"42228a4fa88d43be9245a3f12fe619bf","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-75128","aliases":[],"title":"Langchain-Chatchat through 0.3.1.3 Unauthenticated RCE via /tools/call Endpoint","description":"Langchain-Chatchat through 0.3.1.3 exposes a POST /tools/call API endpoint that invokes any registered tool by name without authentication, leaving the always-registered shell tool callable. Remote attackers can send a single request naming the shell tool to execute arbitrary OS commands as the server user (root in the shipped Docker image).","state":0,"publishedAt":"2026-10-20T00:46:08.977+00:00","modifiedAt":"2026-10-20T14:34:07.343+00:00","affected":[{"ecosystem":"https://pypi.org","name":"Langchain-Chatchat","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"chatchat-space\",\n                    \"product\": \"Langchain-Chatchat\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThanOrEqual\": \"0.3.1.3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"packageURL\": \"pkg:pypi/langchain-chatchat\",\n                    \"collectionURL\": \"https://pypi.org\",\n                    \"repo\": \"https://github.com/chatchat-space/Langchain-Chatchat\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":9.3,"severity":"CRITICAL"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8,"severity":"CRITICAL"}],"references":["https://www.lasso.security/vulnerability-database/cve-2026-75128","https://github.com/chatchat-space/Langchain-Chatchat/blob/a6a9193b5002061719f0eee62c6310bd5b1b7f63/libs/chatchat-server/chatchat/server/api_server/tool_routes.py#L33","https://www.vulncheck.com/advisories/langchain-chatchat-through-0.3.1.3-unauthenticated-rce-via-tools-call-endpoint"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-75128","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-75128","identifiers":["CVE-2026-75128"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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