{"cve":"CVE-2025-71336","nvd":{"published":"2026-06-25T22:16:59.390","modified":"2026-10-12T21:10:00.227","status":"Analyzed","description":"Flowise before 3.0.6 (affected versions 2.2.7-patch.1 and earlier) contains an unsandboxed remote code execution vulnerability in the Custom MCP feature, which is designed to execute OS commands such as launching local MCP servers. Because Flowise's authentication and authorization model is minimal and lacks role-based access control, and the default installation runs without authentication unless FLOWISE_USERNAME and FLOWISE_PASSWORD are set, an attacker can send a crafted JSON payload with the header 'x-request-from: internal' to the /api/v1/node-load-method/customMCP endpoint to execute arbitrary OS commands, resulting in complete compromise of the platform container or server.","cvss_v4":{"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},"cvss_v3":{"version":"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},"cwes":["CWE-78"],"references":["https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6933-jpx5-q87q","https://www.vulncheck.com/advisories/flowise-unsandboxed-remote-code-execution-via-custom-mcp","https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6933-jpx5-q87q"],"products":["flowiseai:flowise"],"source":"nvd","synced_at":"2026-10-19T22:41:17.107060303+00:00"},"epss":{"cve":"CVE-2025-71336","score":0.01148,"percentile":0.66585,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-6933-jpx5-q87q","url":"https://osv.dev/vulnerability/GHSA-6933-jpx5-q87q","summary":"Flowise has unsandboxed remote code execution via Custom MCP","modified":"2026-07-08T07:35:36.876785076Z","packages":[{"ecosystem":"npm","name":"flowise","purl":"pkg:npm/flowise","ranges":[">=2.2.7-patch.1 <3.0.6"],"fixed":["3.0.6"]}]}],"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."]}