{"id":"CVE-2026-41266","aliases":["EUVD-2026-25283","GHSA-4jpm-cgx2-8h37"],"status":"published","title":"Flowise: Sensitive Data Leak in public-chatbotConfig","description":"Flowise is a drag \u0026 drop user interface to build a customized large language model flow. Prior to 3.1.0, /api/v1/public-chatbotConfig/:id ep exposes sensitive data including API keys, HTTP authorization headers and internal configuration without any authentication. An attacker with knowledge just of a chatflow UUID can retrieve credentials stored in password type fields and HTTP headers, leading to credential theft and more. This vulnerability is fixed in 3.1.0.","severity":{"version":"4.0","score":7.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.04059,"percentile":0.90744,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-200","CWE-522","CWE-862"],"published":"2026-04-16T21:44:49Z","modified":"2026-10-28T02:31:11Z","fixes":[{"ecosystem":"npm","package":"flowise","fixed_in":["3.1.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"flowise","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"3.0.13"},{"fixed":"3.1.0"}]}]},{"source":"osv","ecosystem":"npm","package":"flowise","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.1.0"}]}]}],"products":[{"vendor":"flowiseai","product":"flowise"}],"references":[{"url":"https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-4jpm-cgx2-8h37","tags":["x_refsource_CONFIRM","exploit","Exploit","Vendor Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41266","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-4jpm-cgx2-8h37"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41266.json","tags":["advisory"]},{"url":"https://github.com/FlowiseAI/Flowise","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-41266","title":"Flowise: Sensitive Data Leak in public-chatbotConfig","description":"Flowise is a drag \u0026 drop user interface to build a customized large language model flow. Prior to 3.1.0, /api/v1/public-chatbotConfig/:id ep exposes sensitive data including API keys, HTTP authorization headers and internal configuration without any authentication. An attacker with knowledge just of a chatflow UUID can retrieve credentials stored in password type fields and HTTP headers, leading to credential theft and more. This vulnerability is fixed in 3.1.0.","status":"published","published":"2026-04-23T19:11:32.549Z","modified":"2026-04-25T01:27:15.859Z","cvss":[{"version":"4.0","score":7.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-200","CWE-522","CWE-862"],"updated_at":"2026-11-02T13:41:08.498858Z"}],"euvd":[{"id":"EUVD-2026-25283","description":"Flowise is a drag \u0026 drop user interface to build a customized large language model flow. Prior to 3.1.0, /api/v1/public-chatbotConfig/:id ep exposes sensitive data including API keys, HTTP authorization headers and internal configuration without any authentication. An attacker with knowledge just of a chatflow UUID can retrieve credentials stored in password type fields and HTTP headers, leading to credential theft and more. This vulnerability is fixed in 3.1.0.","status":"published","published":"2026-04-23T19:11:32Z","modified":"2026-04-25T01:27:15Z","cvss":[{"version":"4.0","score":7.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T19:24:18.224827Z"}],"ghsa":[{"id":"GHSA-4jpm-cgx2-8h37","title":"Flowise: Sensitive Data Leak in public-chatbotConfig ","description":"### Summary\n\n`/api/v1/public-chatbotConfig/:id `ep exposes sensitive data including API keys, HTTP authorization headers and internal configuration without any authentication. An attacker with knowledge just of a chatflow UUID can retrieve credentials stored in password type fields and HTTP headers, leading to credential theft and more.\n\n### Details\n\nKnowledge of chatflow UUID can be obtained from embedded chat widgets, referrer headers or logs and it's the only prerequest. \n\n`getSinglePublicChatbotConfig` function in `packages/server/src/services/chatflows/index.ts` returns the full **flowData** object without authorization check or data sanitization.\n\nThere is a comment as **\"Safe as public endpoint as chatbotConfig doesn't contain sensitive credential\"** but **flowData** does contain sensitive data such as:\n\n`type: 'password'` fields are stored in plaintext (unstructuredAPIKey in S3File node).\nHTTP Authorization headers in POST / GET Requests nodes.\nInternal API endpoints and webhook URLs.\n\n### PoC\n\n- Add an S3 File node, set \"File Processing Method\" to \"Unstructured\".\n- Enter an API key in \"Unstructured API KEY\" field or add a Requests Post node with Authorization header.\n- Save the chatflow.\n\n`curl -s \"https://localhost/api/v1/public-chatbotConfig/{CHATFLOW_UUID}\"`\n\nResponse:\n\n```\n{\n  \"flowData\": \"{...\\\"unstructuredAPIKey\\\":\\\"victim_key\\\"...\\\"requestsPostHeaders\\\":\\\"Bearer victim_token\\\"...}\"\n}\n```\n\n### Impact\n\nImpacts all Flowise Cloud users with chatflows containing password type fields or any HTTP headers. And self hosted Flowise instances exposed to the internet.","status":"published","published":"2026-04-16T21:44:49Z","modified":"2026-04-24T20:58:07Z","cvss":[{"version":"4.0","score":7.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-200","CWE-522","CWE-862"],"updated_at":"2026-11-02T14:39:57.650091Z"}],"nvd":[{"id":"CVE-2026-41266","description":"Flowise is a drag \u0026 drop user interface to build a customized large language model flow. Prior to 3.1.0, /api/v1/public-chatbotConfig/:id ep exposes sensitive data including API keys, HTTP authorization headers and internal configuration without any authentication. An attacker with knowledge just of a chatflow UUID can retrieve credentials stored in password type fields and HTTP headers, leading to credential theft and more. This vulnerability is fixed in 3.1.0.","status":"published","published":"2026-04-23T20:16:15.03Z","modified":"2026-10-26T21:10:00.17Z","cvss":[{"version":"4.0","score":7.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary"}],"cwes":["CWE-200","CWE-522","CWE-862"],"updated_at":"2026-11-02T14:12:15.867234Z"}],"osv":[{"id":"CVE-2026-41266","title":"Flowise: Sensitive Data Leak in public-chatbotConfig","description":"Flowise is a drag \u0026 drop user interface to build a customized large language model flow. Prior to 3.1.0, /api/v1/public-chatbotConfig/:id ep exposes sensitive data including API keys, HTTP authorization headers and internal configuration without any authentication. An attacker with knowledge just of a chatflow UUID can retrieve credentials stored in password type fields and HTTP headers, leading to credential theft and more. This vulnerability is fixed in 3.1.0.","status":"published","published":"2026-04-23T19:11:32.549Z","modified":"2026-10-28T02:31:11.367355928Z","cvss":[{"version":"4.0","score":7.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N","level":"high"}],"cwes":["CWE-200","CWE-522","CWE-862"],"updated_at":"2026-11-02T15:45:03.764807Z"},{"id":"GHSA-4jpm-cgx2-8h37","title":"Flowise: Sensitive Data Leak in public-chatbotConfig ","description":"### Summary\n\n`/api/v1/public-chatbotConfig/:id `ep exposes sensitive data including API keys, HTTP authorization headers and internal configuration without any authentication. An attacker with knowledge just of a chatflow UUID can retrieve credentials stored in password type fields and HTTP headers, leading to credential theft and more.\n\n### Details\n\nKnowledge of chatflow UUID can be obtained from embedded chat widgets, referrer headers or logs and it's the only prerequest. \n\n`getSinglePublicChatbotConfig` function in `packages/server/src/services/chatflows/index.ts` returns the full **flowData** object without authorization check or data sanitization.\n\nThere is a comment as **\"Safe as public endpoint as chatbotConfig doesn't contain sensitive credential\"** but **flowData** does contain sensitive data such as:\n\n`type: 'password'` fields are stored in plaintext (unstructuredAPIKey in S3File node).\nHTTP Authorization headers in POST / GET Requests nodes.\nInternal API endpoints and webhook URLs.\n\n### PoC\n\n- Add an S3 File node, set \"File Processing Method\" to \"Unstructured\".\n- Enter an API key in \"Unstructured API KEY\" field or add a Requests Post node with Authorization header.\n- Save the chatflow.\n\n`curl -s \"https://localhost/api/v1/public-chatbotConfig/{CHATFLOW_UUID}\"`\n\nResponse:\n\n```\n{\n  \"flowData\": \"{...\\\"unstructuredAPIKey\\\":\\\"victim_key\\\"...\\\"requestsPostHeaders\\\":\\\"Bearer victim_token\\\"...}\"\n}\n```\n\n### Impact\n\nImpacts all Flowise Cloud users with chatflows containing password type fields or any HTTP headers. And self hosted Flowise instances exposed to the internet.","status":"published","published":"2026-04-16T21:44:49Z","modified":"2026-05-05T16:11:51.492559Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"},{"version":"4.0","score":7.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N","level":"high"}],"cwes":["CWE-200","CWE-522","CWE-862"],"updated_at":"2026-11-02T15:46:37.148947Z"}]}}