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CVE-2026-42863— Flowise: Mass Assignment in Chatflow Update Endpoint Allows Cross-Workspace AgentFlow Reassignment

Quick assessment

Affected
FlowiseAI Flowise
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Flowise是FlowiseAI开源的一个用于轻松构建 LLM 应用程序的工具。 Flowise 3.1.2之前版本存在访问控制错误漏洞，该漏洞源于聊天流更新端点缺少服务器端验证和授权检查，可能导致批量赋值漏洞，允许经过身份验证的用户操纵聊天流的内部属性并将其重新分配到另一个工作区，导致跨工作区资源重新分配以及部署和可见性设置的未授权修改。

AI Predicted 6.5 Difficulty: Easy EPSS 0.37% · P28

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
FlowiseAI Flowise < 3.1.2 affected
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I. Basic Information for CVE-2026-42863

Vulnerability Information
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Vulnerability Title
Flowise: Mass Assignment in Chatflow Update Endpoint Allows Cross-Workspace AgentFlow Reassignment
Source: CVE Program / CVE List V5
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 chatflow update endpoint of FlowiseAI. The endpoint allows clients to modify server-controlled properties such as deployed, isPublic, workspaceId, createdDate, and updatedDate when updating a chatflow object. Due to missing server-side validation and authorization checks, an authenticated user can manipulate internal attributes of a chatflow and reassign it to another workspace. This allows cross-workspace resource reassignment and unauthorized modification of deployment and visibility settings. This issue has been patched in version 3.1.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Flowise 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Flowise是FlowiseAI开源的一个用于轻松构建 LLM 应用程序的工具。 Flowise 3.1.2之前版本存在访问控制错误漏洞，该漏洞源于聊天流更新端点缺少服务器端验证和授权检查，可能导致批量赋值漏洞，允许经过身份验证的用户操纵聊天流的内部属性并将其重新分配到另一个工作区，导致跨工作区资源重新分配以及部署和可见性设置的未授权修改。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
FlowiseAI Flowise < 3.1.2 -

II. Public POCs for CVE-2026-42863

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III. Intelligence Information for CVE-2026-42863

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Vendor Advisories for CVE-2026-42863 (1)

Vendor Pages for CVE-2026-42863 (1)

Same Patch Batch · FlowiseAI · 2026-06-08 · 14 CVEs total

CVE-2026-42862 Flowise: Mass Assignment in Tool Update Endpoint Allows Cross-Workspace Resource Reassignm
CVE-2026-42861 Flowise: Mass Assignment in Variable Update Endpoint Allows Cross-Workspace Resource Reass
CVE-2026-46476 Flowise: CustomTemplate create+update mass-assignment allows cross-workspace template take
CVE-2026-46479 Flowise: Evaluation create+update mass-assignment allows cross-workspace evaluation takeov
CVE-2026-46475 Flowise: Assistant create+update mass-assignment allows cross-workspace assistant takeover
CVE-2026-46444 Flowise: Vector Store No Permission Checks
CVE-2026-46478 Flowise: DatasetRow create+update mass-assignment allows cross-workspace row takeover
CVE-2026-46442 Flowise: Authenticated Host RCE via POST /api/v1/node-custom-function and NodeVM Sandbox E
CVE-2026-46477 Flowise: Dataset create+update mass-assignment allows cross-workspace dataset takeover
CVE-2026-46480 Flowise: Evaluator create+update mass-assignment allows cross-workspace evaluator takeover
CVE-2026-46440 Flowise: Basic Auth Credentials Exposed via API
CVE-2026-46443 Flowise: Credential Data Leak
CVE-2026-46441 Flowise: Mass Assignment in Assistant Update Endpoint Allows Cross-Workspace Resource Reas

IV. Related Vulnerabilities

Same product: Flowise
Same vendor: FlowiseAI
Same weakness: CWE-284

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