CVE-2026-69250
Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, the OAuth2 token refresh endpoint POST /api/v1/oauth2-credential/refresh/:credentialId is unauthenticated by design and performs a server-side HTTP request to the credential-controlled accessTokenUrl without SSRF protections. Runtime validation confirmed that the endpoint was reachable without authentication, triggered outbound POST requests to an attacker-controlled server, reflected the full remote response body to the caller through tokenInfo, and sent client_id, client_secret, grant_type=refresh_token, and refresh_token in the request body. This issue is fixed in version 3.1.3.
- Score
- CVSS 4.0 8.5 High
- Status
- Analyzed - security-advisories@github.com
- Published
- 2026-08-04
- Last modified
- 2026-10-23
- Weaknesses
- CWE-639
Affected products
References
- https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-r745-8hwv-h473
- https://github.com/FlowiseAI/Flowise/commit/da8b251a9a4c59484ceaf6f71df7406aede7bef2
- https://github.com/FlowiseAI/Flowise/releases/tag/flowise@3.1.3
