Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Flowiseai | Flowise | < 3.1.2 |
Related Weaknesses (CWE)
References
- https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2ProductRelease Notes
- https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6fw7-3q8r-m5vjExploitVendor Advisory
FAQ
What is CVE-2026-42861?
CVE-2026-42861 is a vulnerability with a CVSS score of 9.6 (CRITICAL). 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. Th...
How severe is CVE-2026-42861?
CVE-2026-42861 has been rated CRITICAL with a CVSS base score of 9.6/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-42861?
Check the references section above for vendor advisories and patch information. Affected products include: Flowiseai Flowise.