CVE-2026-56271

Critical

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.

SeverityCritical

CVSS9.8

Exploit probability—

ProductFlowise

PublishedJul 12, 2026

First seenJul 12, 2026

Weakness typeCWE-321CWE-321

How to fix

Update

flowiseai flowise3.1.0 or later
flowise3.1.0 or later

Vendor advisories

github.com/FlowiseAI/Flowise/security/advisories/GHSA-cc4f-hjpj-g9p8

Affected products

Product	Affected versions	Fixed in
flowiseai flowise	v < 3.1.0	3.1.0
flowisenpm	v < 3.1.0	3.1.0

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