CVE-2026-56270

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

State: Published
Severity: 8.7 High
Published: Jun 24, 2026
Updated: Jun 24, 2026
Reserved: Jun 20, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	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	VulnCheck
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	VulnCheck

Weaknesses

CWE-306 Missing Authentication for Critical Function

Affected Products

Product	Versions
FlowiseFlowise	before 3.1.0Affected 3.1.0Not affected

References

GitHub Security Advisory (GHSA-6pcv-j4jx-m4vx)vendor-advisory
VulnCheck Advisory: Flowise - Unauthenticated OAuth Secrets Disclosure via /api/v1/loginmethod Endpointthird-party-advisory

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