CVE-2026-42862: Flowiseai Flowise

Medium severity, CVSS 5.0. EPSS: 0.3% chance of exploitation in the next 30 days.

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to version 3.1.2, a mass assignment vulnerability exists in the tool update endpoint of FlowiseAI. The endpoint allows authenticated users to modify server-controlled properties such as workspaceId, createdDate, and updatedDate when updating a tool resource. Due to missing server-side validation and authorization checks, an attacker can manipulate the workspaceId field and reassign tools to arbitrary workspaces. This breaks tenant isolation in multi-workspace environments. This issue has been patched in version 3.1.2.

Affected products

• Flowiseai Flowise: before 3.1.2 (fixed in 3.1.2)

Published 2026-06-08. Last modified 2026-07-23.