CVE-2026-56270

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.

• CWE-306

• https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6pcv-j4jx-m4vxExploit, Vendor Advisory
• https://www.vulncheck.com/advisories/flowise-unauthenticated-oauth-secrets-disclosure-via-api-v1-loginmethod-endpointThird Party Advisory
• https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6pcv-j4jx-m4vxExploit, Vendor Advisory

Published

Jun 24, 2026

Last Modified

Jun 26, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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