VULNERABILITY INTELLIGENCE

CVE-2026-56278

CVSS score9.1 CRITICAL
EPSS probability0.53%
CISA KEVNot currently listed
Published2026-06-30
Last modified2026-07-06
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

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.

Weakness classification

  • disclosure@vulncheck.com: CWE-798

Primary references