CVE-2026-42863: CWE-284: Improper Access Control in FlowiseAI Flowise
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.
AI Analysis
Technical Summary
FlowiseAI's Flowise, a drag-and-drop interface for building customized large language model flows, contained a mass assignment vulnerability in its chatflow update endpoint before version 3.1.2. The endpoint failed to enforce server-side validation and authorization checks on critical properties such as deployed, isPublic, workspaceId, createdDate, and updatedDate. As a result, authenticated users could manipulate these internal attributes to reassign chatflows to different workspaces and alter deployment and visibility configurations. This vulnerability is tracked as CVE-2026-42863 with a CVSS 4.0 base score of 7.6 (high severity). The flaw has been fixed in version 3.1.2.
Potential Impact
Exploitation of this vulnerability allows an authenticated user to bypass access controls and modify chatflow objects in unauthorized ways, including reassigning resources to other workspaces and changing deployment and visibility settings. This could lead to unauthorized access or modification of resources across workspace boundaries, potentially impacting confidentiality and integrity of chatflows within the affected Flowise installations.
Mitigation Recommendations
A fix for this vulnerability is available in Flowise version 3.1.2. Users and administrators should upgrade to version 3.1.2 or later to remediate this issue. Since this is not a cloud service, patching the affected software is required to address the vulnerability. There is no vendor advisory content contradicting this, so upgrading is the recommended mitigation.
CVE-2026-42863: CWE-284: Improper Access Control in FlowiseAI Flowise
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.
CVSS v4.0
Score 7.6high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
FlowiseAI's Flowise, a drag-and-drop interface for building customized large language model flows, contained a mass assignment vulnerability in its chatflow update endpoint before version 3.1.2. The endpoint failed to enforce server-side validation and authorization checks on critical properties such as deployed, isPublic, workspaceId, createdDate, and updatedDate. As a result, authenticated users could manipulate these internal attributes to reassign chatflows to different workspaces and alter deployment and visibility configurations. This vulnerability is tracked as CVE-2026-42863 with a CVSS 4.0 base score of 7.6 (high severity). The flaw has been fixed in version 3.1.2.
Potential Impact
Exploitation of this vulnerability allows an authenticated user to bypass access controls and modify chatflow objects in unauthorized ways, including reassigning resources to other workspaces and changing deployment and visibility settings. This could lead to unauthorized access or modification of resources across workspace boundaries, potentially impacting confidentiality and integrity of chatflows within the affected Flowise installations.
Mitigation Recommendations
A fix for this vulnerability is available in Flowise version 3.1.2. Users and administrators should upgrade to version 3.1.2 or later to remediate this issue. Since this is not a cloud service, patching the affected software is required to address the vulnerability. There is no vendor advisory content contradicting this, so upgrading is the recommended mitigation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-30T16:44:48.380Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a26e463e29bf47b501e0dc6
Added to database: 6/8/2026, 3:48:51 PM
Last enriched: 6/8/2026, 4:05:56 PM
Last updated: 6/9/2026, 6:50:21 AM
Views: 9
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