Security Advisory

CVE-2026-56278

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-06-30 22:08:27

Last updated 2026-07-01 14:28:34

Assigner VulnCheck

CVSS score 9.3

State PUBLISHED

Description

Flowise before 3.1.0 (affected versions 3.0.13 and earlier) uses a weak hardcoded default secret ('flowise') for the express-session middleware when the EXPRESS_SESSION_SECRET environment variable is not set (packages/server/src/enterprise/middleware/passport/index.ts). Because this default secret is publicly visible in the source code, an attacker can forge valid signed session cookies to impersonate any user and bypass authentication.

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