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CVE-2026-56278

Flowiseai Flowise hard-coded credentials

9.1 CRITICALEPSS 0.53%
  1. Published30 Jun 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

Flowiseai Flowise< 3.1.0

Remediation

Fixed in
Flowiseai Flowise≥ 3.1.0

References

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Frequently asked

Is CVE-2026-56278 being actively exploited?

CVE-2026-56278 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.53%.

How severe is CVE-2026-56278?

CVE-2026-56278 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.53% probability of exploitation.

Which products are affected by CVE-2026-56278?

Affected products include Flowiseai Flowise.

How do I fix CVE-2026-56278?

Upgrade affected software to a fixed version, for example Flowiseai Flowise 3.1.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-56278 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.