Flowise <= 3.1.1

FlowiseAI is vulnerable to a mass assignment vulnerability in the Assistant controller/service allowing an attacker, authenticated as a member of one workspace, to move an assistant (including configurations, instructions, tools and credentials) to another workspace by overwriting the `workspaceId` and `id` fields in the request body, leading to cross-workspace data takeover and IDOR.

FlowiseAI is vulnerable to cross-workspace data takeover due to mass assignment in the CustomTemplate controller, allowing an attacker to move templates to other workspaces by overwriting the `workspaceId` via API request.

FlowiseAI is vulnerable to a mass assignment vulnerability in the DatasetRow controller/service, allowing an authenticated attacker to overwrite the `workspaceId` and `id` of a DatasetRow entity, leading to cross-workspace data takeover and IDOR.

FlowiseAI is vulnerable to a mass assignment vulnerability in the Evaluator controller/service, where an attacker can manipulate the `workspaceId` during evaluator creation or updates, leading to cross-workspace data takeover and IDOR.

FlowiseAI is vulnerable to authenticated remote code execution (RCE) due to a missing route-level authorization in the `/api/v1/node-custom-function` endpoint, allowing any authenticated user to execute arbitrary JavaScript and escape the NodeVM sandbox to run system commands.

FlowiseAI versions 3.1.1 and earlier contain a mass assignment vulnerability in the variable update endpoint allowing authenticated users to modify server-controlled properties like workspaceId, createdDate, and updatedDate, potentially breaking tenant isolation in multi-workspace environments (CVE-2026-42861).