CVE-2026-42862

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

Published Jun 8, 2026 CVSS 4.0 · 7.6 High EPSS < 1% KEV · Not listed
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 tool update endpoint of FlowiseAI. The endpoint allows authenticated users to modify server-controlled properties such as workspaceId, createdDate, and updatedDate when updating a tool resource. Due to missing server-side validation and authorization checks, an attacker can manipulate the workspaceId field and reassign tools to arbitrary workspaces. This breaks tenant isolation in multi-workspace environments. This issue has been patched in version 3.1.2.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-x5v6-pj28-cwwm FlowiseAI has Mass Assignment in Tool Update Endpoint that Allows Cross-Workspace Resource Reassignment
History
Type Values Removed Values Added
CPEs cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 5.0, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N'}

Type Values Removed Values Added
First Time appeared Flowiseai
Flowiseai flowise
Vendors & Products Flowiseai
Flowiseai flowise
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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 tool update endpoint of FlowiseAI. The endpoint allows authenticated users to modify server-controlled properties such as workspaceId, createdDate, and updatedDate when updating a tool resource. Due to missing server-side validation and authorization checks, an attacker can manipulate the workspaceId field and reassign tools to arbitrary workspaces. This breaks tenant isolation in multi-workspace environments. This issue has been patched in version 3.1.2.
Title Flowise: Mass Assignment in Tool Update Endpoint Allows Cross-Workspace Resource Reassignment
Weaknesses CWE-284
CWE-639
CWE-915
References
Metrics cvssV4_0

{'score': 7.6, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Jun 8, 2026, 3:51 PM
Reserved
Apr 30, 2026, 4:44 PM
Status
Analyzed
Published
Jun 8, 2026, 4:16 PM
Modified
Jul 23, 2026, 7:10 AM