by Kastro
Paper/Archive/CVE-2026-42861

CVE-2026-42861

FlowiseAI Flowise — Flowise: Mass Assignment in Variable Update Endpoint Allows Cross-Workspace Resource Reassignment

EPSS 0.3%public exploitCVSS 9.6
critical.is priorityof 100
42
CVSS 9.6 (NVD)9.6 / 10 × 3028.8Not in CISA KEV+300.0EPSS percentile 17.0.170 × 203.4Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Flowise< 3.1.2–CNA

Scores by source

NVD9.6CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
GitHub_M (CNA)7.6CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: partial

References

refgithub.com/FlowiseAI/Flowise/security/advisories/GHSA-6fw7-3q8r-m5vjrefgithub.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2