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.
Metrics
Affected Vendors & Products
| Vendors | Products |
|---|---|
| Flowiseai |
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References
History
Tue, 30 Jun 2026 22:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Flowise - Session Hijacking via Weak Default Express Session Secret | |
| First Time appeared |
Flowiseai
Flowiseai flowise |
|
| Weaknesses | CWE-798 | |
| CPEs | cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Flowiseai
Flowiseai flowise |
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| References |
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| Metrics |
cvssV3_1
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MITRE
Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-06-30T22:08:27.947Z
Reserved: 2026-06-20T01:51:24.919Z
Link: CVE-2026-56278
Vulnrichment
No data.
NVD
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Redhat
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OpenCVE Enrichment
Updated: 2026-07-01T00:00:17Z