{"id":"CVE-2026-75128","title":"Langchain-Chatchat through 0.3.1.3 Unauthenticated RCE via /tools/call Endpoint","summary":"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 nam…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-306"],"vendor":"chatchat-space","product":"Langchain-Chatchat","affected":["Langchain-Chatchat <= 0.3.1.3"],"published":"2026-10-20","updated":"2026-10-20","sourceUpdated":"2026-10-20T00:46:08.977Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-75128","references":[{"url":"https://www.lasso.security/vulnerability-database/cve-2026-75128","label":"Lasso.security Advisory"},{"url":"https://github.com/chatchat-space/Langchain-Chatchat/blob/a6a9193b5002061719f0eee62c6310bd5b1b7f63/libs/chatchat-server/chatchat/server/api_server/tool_routes.py#L33"},{"url":"https://www.vulncheck.com/advisories/langchain-chatchat-through-0.3.1.3-unauthenticated-rce-via-tools-call-endpoint","label":"VulnCheck Advisory: Langchain-Chatchat through 0.3.1.3 Unauthenticated RCE via /tools/call Endpoint"}],"tags":["cve.org"],"ingestedAt":"2026-10-20T01:49:42.627Z","slug":"CVE-2026-75128","body":"## Overview\n\nLangchain-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).\n\n## Affected\n\n- `Langchain-Chatchat <= 0.3.1.3`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}