CVE-2026-41266

### Summary `/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. ### Details Knowledge of chatflow UUID can be obtained from embedded chat widgets, referrer headers or logs and it's the only prerequest. `getSinglePublicChatbotConfig` function in `packages/server/src/services/chatflows/index.ts` returns the full **flowData** object without authorization check or data sanitization. There is a comment as **"Safe as public endpoint as chatbotConfig doesn't contain sensitive credential"** but **flowData** does contain sensitive data such as: `type: 'password'` fields are stored in plaintext (unstructuredAPIKey in S3File node). HTTP Authorization headers in POST / GET Requests nodes. Internal API endpoints and webhook URLs. ### PoC - Add an S3 File node, set "File Processing Method" to "Unstructured". - Enter an API key in "Unstructured API KEY" field or add a Requests Post node with Authorization header. - Save the chatflow. `curl -s "https://localhost/api/v1/public-chatbotConfig/{CHATFLOW_UUID}"` Response: ``` { "flowData": "{...\"unstructuredAPIKey\":\"victim_key\"...\"requestsPostHeaders\":\"Bearer victim_token\"...}" } ``` ### Impact Impacts all Flowise Cloud users with chatflows containing password type fields or any HTTP headers. And self hosted Flowise instances exposed to the internet.

### Summary `/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. ### Details Knowledge of chatflow UUID can be obtained from embedded chat widgets, referrer headers or logs and it's the only prerequest. `getSinglePublicChatbotConfig` function in `packages/server/src/services/chatflows/index.ts` returns the full **flowData** object without authorization check or data sanitization. There is a comment as **"Safe as public endpoint as chatbotConfig doesn't contain sensitive credential"** but **flowData** does contain sensitive data such as: `type: 'password'` fields are stored in plaintext (unstructuredAPIKey in S3File node). HTTP Authorization headers in POST / GET Requests nodes. Internal API endpoints and webhook URLs. ### PoC - Add an S3 File node, set "File Processing Method" to "Unstructured". - Enter an API key in "Unstructured API KEY" field or add a Requests Post node with Authorization header. - Save the chatflow. `curl -s "https://localhost/api/v1/public-chatbotConfig/{CHATFLOW_UUID}"` Response: ``` { "flowData": "{...\"unstructuredAPIKey\":\"victim_key\"...\"requestsPostHeaders\":\"Bearer victim_token\"...}" } ``` ### Impact Impacts all Flowise Cloud users with chatflows containing password type fields or any HTTP headers. And self hosted Flowise instances exposed to the internet.

Flowise es una interfaz de usuario de arrastrar y soltar para construir un flujo personalizado de modelo de lenguaje grande. Antes de la versión 3.1.0, el endpoint /api/v1/public-chatbotConfig/:id expone datos sensibles, incluyendo claves API, encabezados de autorización HTTP y configuración interna, sin ninguna autenticación. Un atacante con solo el conocimiento de un UUID de chatflow puede recuperar credenciales almacenadas en campos de tipo contraseña y encabezados HTTP, lo que lleva al robo de credenciales y más. Esta vulnerabilidad se corrige en la versión 3.1.0.