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CVE-2026-56270— Flowise - Unauthenticated OAuth Secrets Disclosure via /api/v1/loginmethod Endpoint

Quick assessment

Affected
Flowise Flowise
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FlowiseAI Flowise是FlowiseAI公司开源的一个用于轻松构建 LLM 应用程序的工具。 FlowiseAI Flowise 3.1.0之前版本存在授权问题漏洞，该漏洞源于/api/v1/loginmethod端点缺少身份验证，可能导致未经身份验证的用户通过提供organizationId参数检索组织完整的SSO配置，包括明文OAuth客户端凭据。

CVSS 7.5 · High EPSS 2.05% · P81

Public Exploits 1

Nuclei · 1 CVE-2026-56270.yaml [template]

Affected Version Matrix 2

VendorProduct Version RangeStatus
Flowise Flowise < 3.1.0 affected
3.1.0 unaffected
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I. Basic Information for CVE-2026-56270

Vulnerability Information
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Vulnerability Title
Flowise - Unauthenticated OAuth Secrets Disclosure via /api/v1/loginmethod Endpoint
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
FlowiseAI Flowise 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FlowiseAI Flowise是FlowiseAI公司开源的一个用于轻松构建 LLM 应用程序的工具。 FlowiseAI Flowise 3.1.0之前版本存在授权问题漏洞，该漏洞源于/api/v1/loginmethod端点缺少身份验证，可能导致未经身份验证的用户通过提供organizationId参数检索组织完整的SSO配置，包括明文OAuth客户端凭据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Flowise Flowise 0 ~ 3.1.0 -

II. Public POCs for CVE-2026-56270

# POC Description Source Link Shenlong Link
1 Flowise before 3.1.0 contains a missing authentication vulnerability in the /api/v1/loginmethod endpoint, allowing unauthenticated remote attackers to retrieve an organization's complete SSO configuration including OAuth client secrets by providing an organizationId parameter. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-56270.yaml POC Details
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Qwen3.6-35B-A3B · 10291 chars
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III. Intelligence Information for CVE-2026-56270

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Vendor Advisories for CVE-2026-56270 (2)

Same Patch Batch · Flowise · 2026-06-24 · 4 CVEs total

CVE-2025-71332 6.5 MEDIUM Flowise - SQL Injection in importChatflows API via chatflow.id Parameter
CVE-2026-56269 4.6 MEDIUM Flowise - Weak Default Token Hash Secret in JWT Token Encryption
CVE-2026-56272 4.1 MEDIUM Flowise - Insufficient Password Salt Rounds in Bcrypt Hashing

IV. Related Vulnerabilities

Same product: Flowise
Same vendor: Flowise
Same weakness: CWE-306

V. Comments for CVE-2026-56270

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