Auth bypass in Flowiseai Flowise
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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.006 (47.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Flowiseai Flowise — versions < 3.1.3
Weakness classification (CWE)
References
- github.com/FlowiseAI/Flowise/security/advisories/GHSA-r745-8hwv-h473 (Exploit, Vendor Advisory)
- github.com/FlowiseAI/Flowise/commit/da8b251a9a4c59484ceaf6f71df7406aede7bef2 (Patch)
- github.com/FlowiseAI/Flowise/releases/tag/flowise@3.1.3 (Patch, Release Notes)
Frequently asked questions
- What is CVE-2026-69250?
- CVE-2026-69250 is a high-severity vulnerability in Flowiseai Flowise, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 7.5/10. Published 2026-08-04.
- How severe is CVE-2026-69250?
- High severity. CVSS v3 base score is 7.5 out of 10.