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.
Fix
Patch, vendor advisory and mitigation references on NVD 4
- https://github.com/FlowiseAI/Flowise/commit/da8b251a9a4c59484ceaf6f71df7406aede7bef2 Patch
- https://github.com/FlowiseAI/Flowise/releases/tag/[email protected] Patch, Release Notes
- https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-r745-8hwv-h473 Exploit, Vendor Advisory
- https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-r745-8hwv-h473 Exploit, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 8.5 · flowiseaiNVD modified 2026-10-23 23:10
Affected (CPE criteria) 1
cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:*
References 4
- https://github.com/FlowiseAI/Flowise/commit/da8b251a9a4c59484ceaf6f71df7406aede7bef2 Patch
- https://github.com/FlowiseAI/Flowise/releases/tag/[email protected] Patch, Release Notes
- https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-r745-8hwv-h473 Exploit, Vendor Advisory
- https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-r745-8hwv-h473 Exploit, Vendor Advisory