{"id":"GHSA-9hrv-gvrv-6gf2","summary":"Flowise Execute Flow function has an SSRF vulnerability","details":"### Summary\n\nThe attacker provides an intranet address through the base url field configured in the Execute Flow node \n→ Bypass checkDenyList / resolveAndValidate in httpSecurity.ts (not called)\n→ Causes the server to initiate an HTTP request to any internal network address, read cloud metadata, or detect internal network services \n\n### Details\n\n\u003cimg width=\"1280\" height=\"860\" alt=\"9a52a74e6fe2fd78e4962d1d68057fc2\" src=\"https://github.com/user-attachments/assets/20df0006-9129-4886-8928-16d19a617c23\" /\u003e\n\nThen initiate the call: \n\n```\nPOST /api/v1/prediction/d6739838-d3b3-43d9-86ff-911a3d757a7e HTTP/1.1\nHost: 127.0.0.1:3000\nContent-Type: application/json\nAuthorization: Bearer apikey\nContent-Length: 17\n\n{\"question\": \"1\"}\n```\n\nServer received a request:\n\n\u003cimg width=\"1432\" height=\"172\" alt=\"f45c757fec408e13739db068252ff21b\" src=\"https://github.com/user-attachments/assets/d3dfe0f5-83ec-4c79-ab32-754382a68d5f\" /\u003e\n\nAnd there is an echo: \n\n\u003cimg width=\"1280\" height=\"666\" alt=\"fa0caf0deb306cfeeea8fdf8941a287e\" src=\"https://github.com/user-attachments/assets/55a94d25-120b-4e9c-9517-46c2fc2b667f\" /\u003e\n\nFix:\nCall secureFetch for verification\n\n\n\n### Impact\n\nThis is a Server-Side Request Forgery (SSRF) vulnerability that may lead to the following risks: \n- Explore Internal Web Applications\n- Access sensitive management interfaces\n- Leak internal configuration, credentials, or confidential information\n\nThis vulnerability significantly increases the risk of internal service enumeration and potential lateral movement in enterprise environments.","aliases":["CVE-2026-56275"],"modified":"2026-09-23T21:45:07.949038157Z","published":"2026-04-16T21:23:17Z","database_specific":{"nvd_published_at":null,"cwe_ids":["CWE-918"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-04-16T21:23:17Z"},"references":[{"type":"WEB","url":"https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9hrv-gvrv-6gf2"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56275"},{"type":"PACKAGE","url":"https://github.com/FlowiseAI/Flowise"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/flowise-server-side-request-forgery-via-execute-flow-base-url"}],"affected":[{"package":{"name":"flowise","ecosystem":"npm","purl":"pkg:npm/flowise"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.1.0"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 3.0.13","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-9hrv-gvrv-6gf2/GHSA-9hrv-gvrv-6gf2.json"}},{"package":{"name":"flowise-components","ecosystem":"npm","purl":"pkg:npm/flowise-components"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.1.0"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 3.0.13","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-9hrv-gvrv-6gf2/GHSA-9hrv-gvrv-6gf2.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N"}]}