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CVE PROGRAM SOURCE RECORD9.3 Critical

CVE-2026-56278

Flowise - Session Hijacking via Weak Default Express Session Secret

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Status
Published
Published
Updated
Assigning organization
VulnCheck

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Flowise Flowise

Default version status: unaffected

  • 0 to < 3.1.0affected
  • 3.1.0unaffected
pkg:npm/flowise

References