CVE-2026-42862

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.

• CWE-284
• CWE-639
• CWE-915

• https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2Product, Release Notes
• https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-x5v6-pj28-cwwmExploit, Vendor Advisory
• https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-x5v6-pj28-cwwmExploit, Vendor Advisory

Published

Jun 8, 2026

Last Modified

Jul 23, 2026

Status

Analyzed

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