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CVE-2026-42861

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

Published: Jun 8, 2026Updated: Jun 11, 2026 Sources: CVE List NVDCWE-284
NVD MITRE
9.6CVSSCRITICAL
EPSS Score
0.2%
Top 88.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 Vector Breakdown

AV:NAC:LPR:LUI:NS:CC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-284CWE-639CWE-915

Affected Products

flowiseflowiseai
On-premWeb App
AI / ML / ai-agent-tooling
FlowiseFlowiseAI
On-premWeb App
AI / ML / ai-agent-tooling
flowiseaioss-projectAI / MLaka flowise, flowise-components, embed

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Initial Access
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References

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

Timeline

Published
Jun 8, 2026
Last Updated
Jun 11, 2026

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