CVE-2026-56270CWE-306

Flowise - Unauthenticated OAuth Secrets Disclosure via /api/v1/loginmethod Endpoint

High · published June 24, 2026

CVSS v4.0
8.7
EPSS
2%
Percentile
81.1
In the wild
Unconfirmed
What it is

Flowise before 3.1.0 (versions 3.0.13 and earlier) contains a missing authentication vulnerability in the /api/v1/loginmethod endpoint that allows unauthenticated users to retrieve an organization's complete SSO configuration, including OAuth client secrets in cleartext, by providing an organizationId parameter. Remote attackers can send a GET request to harvest sensitive API credentials for Google, Microsoft/Azure, GitHub, and Auth0 integrations. This affects FlowiseAI Cloud and self-hosted instances where the endpoint is exposed.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.02048 · 81.1th percentile
Weakness
CWE-306 · Missing Authentication for Critical Function
Published
2026-06-24T11:53Z
EPSS history
Timeline
  • 24 JUN 11:53Z
    Flowise - Unauthenticated OAuth Secrets Disclosure via /api/v1/loginmethod Endpoint
    cvelistv5