| Component | Flowise |
| Severity | critical (CVSS 9.8) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Published (NVD) | 2026-07-12 |
| Last modified | 2026-07-14 |
| Affected versions | flowise < 3.1.0 |
| Fixed in | 3.1.0 |
| Weakness | CWE-321 |
| CISA KEV | not listed |
NVD description
Flowise before 3.1.0 (affected versions 3.0.13 and earlier) uses weak hardcoded default JWT secrets ('auth_token', 'refresh_token') and default audience and issuer values ('AUDIENCE', 'ISSUER') in the enterprise passport authentication middleware (packages/server/src/enterprise/middleware/passport/index.ts). When the corresponding environment variables (JWT_AUTH_TOKEN_SECRET, JWT_REFRESH_TOKEN_SECRET, JWT_AUDIENCE, JWT_ISSUER) are not set, the application silently falls back to these publicly known defaults, allowing an attacker to forge valid JWTs and impersonate any user, including administrators, resulting in authentication bypass.
What to do
- Upgrade Flowise to
3.1.0or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-56271
- https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-cc4f-hjpj-g9p8
- https://www.vulncheck.com/advisories/flowise-weak-default-jwt-secrets-in-authentication-middleware
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