CVE-2026-56270 | Flowise before 3.1.0 (versions 3.0.13 and earlier) contains … | CVSS 7.5 HIGH

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.

Metadata

CVE ID: CVE-2026-56270
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-20 01:47 UTC
Published: 2026-06-24 11:53 UTC
Last updated: 2026-06-24 12:46 UTC
Primary CWE: CWE-306
Missing Authentication for Critical Function
Vendor / Product: Flowise / Flowise
Sources: cve.org · NVD

Severity & Metrics

7.5 HIGH CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: yes
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
Flowise	Flowise	—	0 < 3.1.0, 3.1.0

Weakness (CWE)

CWE	Source	Description
CWE-306	cna	Missing Authentication for Critical Function

CVSS scores (2)

Score	Severity	Version	Source	Vector
8.7	HIGH	4.0	cna	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
7.5	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References (2)

GitHub Security Advisory (GHSA-6pcv-j4jx-m4vx) https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6pcv-j4jx-m4vx
VulnCheck Advisory: Flowise - Unauthenticated OAuth Secrets Disclosure via /api/v1/loginmethod Endpoint https://www.vulncheck.com/advisories/flowise-unauthenticated-oauth-secrets-disclosure-via-api-v1-loginmethod-endpoint