### Summary 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. ### Details The endpoint responsible for updating variables: **PUT /api/v1/variables/{variableId}** accepts a JSON request body containing the variable definition. However, the backend does not restrict which attributes can be modified by the client. As a result, user-controlled request bodies can include internal properties that should normally be controlled exclusively by the server. Server-controlled fields that can be manipulated include: - workspaceId - createdDate - updatedDate These fields appear to be directly mapped to the database entity without strict input validation or authorization checks. For example, the following request body was accepted by the server: ```json { "name": "aaa", "value": "bbbe", "type": "static", "createdDate": "2016-03-06T17:59:30.000Z", "updatedDate": "2016-03-06T18:00:17.000Z", "workspaceId": "11111111-2222-3333-4444-555555555555" } ``` The server accepted the attacker-controlled workspaceId and metadata fields and persisted them. ### PoC **Request** ```http PUT /api/v1/variables/<VARIABLE_ID> Content-Type: application/json { "name": "aaa", "value": "bbbe", "type": "static", "createdDate": "2016-03-06T17:59:30.000Z", "updatedDate": "2016-03-06T18:00:17.000Z", "workspaceId": "11111111-2222-3333-4444-555555555555" } ``` **Response** ```json { "id": "0a2b9f61-4a97-4ff8-b80d-00275ed18674", "name": "aaa", "value": "bbbe", "type": "static", "createdDate": "2016-03-06T17:59:30.000Z", "updatedDate": "2026-03-06T18:05:17.000Z", "workspaceId": "11111111-2222-3333-4444-555555555555" } ``` This confirms that the backend accepts and persists attacker-controlled internal properties. ### Impact This vulnerability allows authenticated users to manipulate internal attributes of variable resources. Possible impacts include: 1. Cross-workspace reassignment of variables (workspaceId) 2. Unauthorized modification of metadata (createdDate, updatedDate) 3. Potential tenant isolation bypass in multi-workspace deployments In multi-tenant environments, this may allow an attacker to move variables between workspaces without authorization.
### Summary 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. ### Details The endpoint responsible for updating variables: **PUT /api/v1/variables/{variableId}** accepts a JSON request body containing the variable definition. However, the backend does not restrict which attributes can be modified by the client. As a result, user-controlled request bodies can include internal properties that should normally be controlled exclusively by the server. Server-controlled fields that can be manipulated include: - workspaceId - createdDate - updatedDate These fields appear to be directly mapped to the database entity without strict input validation or authorization checks. For example, the following request body was accepted by the server: ```json { "name": "aaa", "value": "bbbe", "type": "static", "createdDate": "2016-03-06T17:59:30.000Z", "updatedDate": "2016-03-06T18:00:17.000Z", "workspaceId": "11111111-2222-3333-4444-555555555555" } ``` The server accepted the attacker-controlled workspaceId and metadata fields and persisted them. ### PoC **Request** ```http PUT /api/v1/variables/<VARIABLE_ID> Content-Type: application/json { "name": "aaa", "value": "bbbe", "type": "static", "createdDate": "2016-03-06T17:59:30.000Z", "updatedDate": "2016-03-06T18:00:17.000Z", "workspaceId": "11111111-2222-3333-4444-555555555555" } ``` **Response** ```json { "id": "0a2b9f61-4a97-4ff8-b80d-00275ed18674", "name": "aaa", "value": "bbbe", "type": "static", "createdDate": "2016-03-06T17:59:30.000Z", "updatedDate": "2026-03-06T18:05:17.000Z", "workspaceId": "11111111-2222-3333-4444-555555555555" } ``` This confirms that the backend accepts and persists attacker-controlled internal properties. ### Impact This vulnerability allows authenticated users to manipulate internal attributes of variable resources. Possible impacts include: 1. Cross-workspace reassignment of variables (workspaceId) 2. Unauthorized modification of metadata (createdDate, updatedDate) 3. Potential tenant isolation bypass in multi-workspace deployments In multi-tenant environments, this may allow an attacker to move variables between workspaces without authorization.
Update flowise to 3.1.2 if you use the affected versions. Test the change in a non-production environment first.
Local check
hol-guard supply-chain scanFlowiseAI has Mass Assignment in Variable Update Endpoint that Allows Cross-Workspace Resource Reassignment affects flowise (npm). Severity is high. ### Summary 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. ### Details The endpoint responsible for updating variables: **PUT /api/v1/variables/{variableId}** accepts a JSON request body containing the variable definition. However, the backend does not restrict which attributes can be modified by the client. As a result, user-controlled request bodies can include internal properties that should normally be controlled exclusively by the server. Server-controlled fields that can be manipulated include: - workspaceId - createdDate - updatedDate These fields appear to be directly mapped to the database entity without strict input validation or authorization checks. For example, the following request body was accepted by the server: ```json { "name": "aaa", "value": "bbbe", "type": "static", "createdDate": "2016-03-06T17:59:30.000Z", "updatedDate": "2016-03-06T18:00:17.000Z", "workspaceId": "11111111-2222-3333-4444-555555555555" } ``` The server accepted the attacker-controlled workspaceId and metadata fields and persisted them. ### PoC **Request** ```http PUT /api/v1/variables/<VARIABLE_ID> Content-Type: application/json { "name": "aaa", "value": "bbbe", "type": "static", "createdDate": "2016-03-06T17:59:30.000Z", "updatedDate": "2016-03-06T18:00:17.000Z", "workspaceId": "11111111-2222-3333-4444-555555555555" } ``` **Response** ```json { "id": "0a2b9f61-4a97-4ff8-b80d-00275ed18674", "name": "aaa", "value": "bbbe", "type": "static", "createdDate": "2016-03-06T17:59:30.000Z", "updatedDate": "2026-03-06T18:05:17.000Z", "workspaceId": "11111111-2222-3333-4444-555555555555" } ``` This confirms that the backend accepts and persists attacker-controlled internal properties. ### Impact This vulnerability allows authenticated users to manipulate internal attributes of variable resources. Possible impacts include: 1. Cross-workspace reassignment of variables (workspaceId) 2. Unauthorized modification of metadata (createdDate, updatedDate) 3. Potential tenant isolation bypass in multi-workspace deployments In multi-tenant environments, this may allow an attacker to move variables between workspaces without authorization.
AI coding agents often install or upgrade packages automatically in npm. A high vulnerability in a dependency can be pulled into a project through a normal install or update without a human reviewing the change, expanding the blast radius from a single package to every agent workspace that depends on it.
| Package | Affected range | Fixed version |
|---|---|---|
| flowisenpm | <=3.1.1 | 3.1.2 |
Fixed versions are reported by the source feed; confirm compatibility before updating.
Reported by GitHub Security Advisories (ghsa).
HOL Guard can help your team review package activity against supported protection paths.
Explore HOL GuardUpdate flowise to 3.1.2 if you use the affected versions. Test the change in a non-production environment first.
Local check
hol-guard supply-chain scanFlowiseAI has Mass Assignment in Variable Update Endpoint that Allows Cross-Workspace Resource Reassignment affects flowise (npm). Severity is high. ### Summary 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. ### Details The endpoint responsible for updating variables: **PUT /api/v1/variables/{variableId}** accepts a JSON request body containing the variable definition. However, the backend does not restrict which attributes can be modified by the client. As a result, user-controlled request bodies can include internal properties that should normally be controlled exclusively by the server. Server-controlled fields that can be manipulated include: - workspaceId - createdDate - updatedDate These fields appear to be directly mapped to the database entity without strict input validation or authorization checks. For example, the following request body was accepted by the server: ```json { "name": "aaa", "value": "bbbe", "type": "static", "createdDate": "2016-03-06T17:59:30.000Z", "updatedDate": "2016-03-06T18:00:17.000Z", "workspaceId": "11111111-2222-3333-4444-555555555555" } ``` The server accepted the attacker-controlled workspaceId and metadata fields and persisted them. ### PoC **Request** ```http PUT /api/v1/variables/<VARIABLE_ID> Content-Type: application/json { "name": "aaa", "value": "bbbe", "type": "static", "createdDate": "2016-03-06T17:59:30.000Z", "updatedDate": "2016-03-06T18:00:17.000Z", "workspaceId": "11111111-2222-3333-4444-555555555555" } ``` **Response** ```json { "id": "0a2b9f61-4a97-4ff8-b80d-00275ed18674", "name": "aaa", "value": "bbbe", "type": "static", "createdDate": "2016-03-06T17:59:30.000Z", "updatedDate": "2026-03-06T18:05:17.000Z", "workspaceId": "11111111-2222-3333-4444-555555555555" } ``` This confirms that the backend accepts and persists attacker-controlled internal properties. ### Impact This vulnerability allows authenticated users to manipulate internal attributes of variable resources. Possible impacts include: 1. Cross-workspace reassignment of variables (workspaceId) 2. Unauthorized modification of metadata (createdDate, updatedDate) 3. Potential tenant isolation bypass in multi-workspace deployments In multi-tenant environments, this may allow an attacker to move variables between workspaces without authorization.
AI coding agents often install or upgrade packages automatically in npm. A high vulnerability in a dependency can be pulled into a project through a normal install or update without a human reviewing the change, expanding the blast radius from a single package to every agent workspace that depends on it.
| Package | Affected range | Fixed version |
|---|---|---|
| flowisenpm | <=3.1.1 | 3.1.2 |
Fixed versions are reported by the source feed; confirm compatibility before updating.
Reported by GitHub Security Advisories (ghsa).
HOL Guard can help your team review package activity against supported protection paths.
Explore HOL Guard