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.

Severity (CVSS)

Base score9.3
SeverityCritical
VersionCVSS 4.0
VectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Provided byCNA

Weaknesses

  • CWE-798 — Use of Hard-coded Credentials

Affected products

VendorProductVersions
FlowiseFlowise0 to <3.1.0; 3.1.0

References

Authoritative sources

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Generated from the official CVE List on 01 Jul 2026 07:05 UTC.