CVE-2026-42863: FlowiseAI has Mass Assignment in Chatflow Update Endpoint that Allows Cross-Workspace AgentFlow Reassignment

A Mass Assignment vulnerability exists in the chatflow update endpoint of FlowiseAI.

The endpoint allows clients to modify server-controlled properties such as deployed, isPublic, workspaceId, createdDate, and updatedDate when updating a chatflow object.

Due to missing server-side validation and authorization checks, an authenticated user can manipulate internal attributes of a chatflow and reassign it to another workspace. This allows cross-workspace resource reassignment and unauthorized modification of deployment and visibility settings.