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CVE-2025-71336

Flowiseai Flowise remote code execution

9.8 CRITICALPublic exploitEPSS 1.15%
  1. Published25 Jun 2026

Description

Flowise before 3.0.6 (affected versions 2.2.7-patch.1 and earlier) contains an unsandboxed remote code execution vulnerability in the Custom MCP feature, which is designed to execute OS commands such as launching local MCP servers. Because Flowise's authentication and authorization model is minimal and lacks role-based access control, and the default installation runs without authentication unless FLOWISE_USERNAME and FLOWISE_PASSWORD are set, an attacker can send a crafted JSON payload with the header 'x-request-from: internal' to the /api/v1/node-load-method/customMCP endpoint to execute arbitrary OS commands, resulting in complete compromise of the platform container or server.

CVSS 3.1 breakdown

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

Affected products

Flowiseai Flowise< 3.0.6

Remediation

Fixed in
Flowiseai Flowise≥ 3.0.6

References

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Frequently asked

Is CVE-2025-71336 being actively exploited?

CVE-2025-71336 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 1.15%.

How severe is CVE-2025-71336?

CVE-2025-71336 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 1.15% probability of exploitation.

Which products are affected by CVE-2025-71336?

Affected products include Flowiseai Flowise.

How do I fix CVE-2025-71336?

Upgrade affected software to a fixed version, for example Flowiseai Flowise 3.0.6 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-71336 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.