CVE-2026-42861

Description

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.

References

• https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2
• https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6fw7-3q8r-m5vj