CVE-2026-42861

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 v3 9.6 CRITICAL

9.6^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.1 / Impact : 5.8

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2	Product Release Notes
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6fw7-3q8r-m5vj	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:*

History

11 Jun 2026, 03:53

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 9.6
CPE		cpe:2.3:a:flowiseai:flowise::::::::
References	~~() https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2 -~~	() https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2 - Product, Release Notes
References	~~() https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6fw7-3q8r-m5vj -~~	() https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6fw7-3q8r-m5vj - Exploit, Vendor Advisory
First Time		Flowiseai flowise Flowiseai

08 Jun 2026, 16:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-08 16:16

Updated : 2026-06-11 03:53

NVD link : CVE-2026-42861

Mitre link : CVE-2026-42861

CVE.ORG link : CVE-2026-42861

JSON object : View

Products Affected

flowiseai

flowise

CWE

CWE-284

Improper Access Control

CWE-639

Authorization Bypass Through User-Controlled Key

CWE-915

Improperly Controlled Modification of Dynamically-Determined Object Attributes

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