CVE-2026-56270 json
Flowise - Unauthenticated OAuth Secrets Disclosure via /api/v1/loginmethod Endpoint
published 2026-04-16 6 mo ago modified 2026-06-26 4 mo ago also GHSA-6pcv-j4jx-m4vx , EUVD-2026-38747
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.0%
- EPSS 2.0% chance of exploitation in 30 days, percentile 81%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
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.
Patch / fix
- npm flowise 3.1.0
- Flowise Flowise 3.1.0
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
2.05% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Nuclei template Flowise <= 3.0.13 - Unauthenticated OAuth Configuration Disclosure nuclei detection template
- github.com https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6pcv-j4jx-m4vx referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | 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 |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| CNA | 4.0 | 8.7 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| GitHub | 3.0 | 5.3 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | flowise | <3.1.0 |
3.1.0 |
Affected products
- Flowise Flowise
Classification
References
-
github.com
/FlowiseAI/Flowise/security/advisories/GHSA-6pcv-j4jx-m4vx
vendor-advisory, exploit, web
-
vulncheck.com
/advisories/flowise-unauthenticated-oauth-secrets-disclosure-via-api-v1-loginmethod-endpoint
third-party-advisory
-
github.com
/FlowiseAI/Flowise
package
Sources
- CVE List CVE-2026-56270
- GitHub Advisory GHSA-6pcv-j4jx-m4vx
- NVD CVE-2026-56270
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