CVE-2026-42861: Flowise is a drag & drop user interface to build a customized large language model flow. Prior to ve…
- Occurred
- Jun 8, 2026
- Published
- Jun 8, 2026
- Source
- NVD CVE
Summary
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 variable update endpoint of FlowiseAI. The endpoint allows authenticated users to modify server-controlled properties such as workspaceId, createdDate, and updatedDate when updating a variable resource. Due to missing server-side validation and authorization checks, an attacker can manipulate the workspaceId field and reassign variables to arbitrary workspaces. This behavior may break tenant isolation in multi-workspace environments. This issue has been patched in version 3.1.2.
Tags
- CVE
- CVE-2026-42861
- cvss:CRITICAL
Classification
Rationale: Mass assignment vulnerability allows unauthorized workspace reassignment, breaking tenant isolation and enabling data access across tenants.
Classifier: Qwen/Qwen3.5-35B-A3B-FP8