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Vulnerability record · CVE-2025-71336 · published 25 June 2026

CVE-2025-71336: Flowiseai flowise os command injection vulnerability

Flowiseai · Flowise

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.

9.3 CVSS 4.0 Critical EPSS 1.1% · top 34.5% CWE-78 · OS command injection
9.3CVSS 4.0 base score
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References, 2 tagged exploit
1 Jul 2026Last modified by NVD

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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6933-jpx5-q87q ExploitMitigationVendor Advisory
https://www.vulncheck.com/advisories/flowise-unsandboxed-remote-code-execution-via-custom-mcp Third Party Advisory
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6933-jpx5-q87q ExploitMitigationVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2025-71338Flowiseai flowise vulnerabilityFlowise through 2.2.7 fails to sanitize path segments in the document-store loader endpoint, allowing unauthenticated attackers to write files outsid…EPSS 1.2%10.0CVE-2025-59528Flowise CustomMCP node code injection enables remote code executionFlowise 3.0.5 passes user-supplied mcpServerConfig input directly into the JavaScript Function() constructor inside convertToValidJSONString, with no…EPSS 86%analysed9.9CVE-2026-40933Flowiseai flowise os command injection vulnerabilityFlowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, due to unsafe serialization of stdio command…EPSS 1.3%9.9CVE-2025-61913Flowiseai flowise path traversal vulnerabilityFlowise is a drag & drop user interface to build a customized large language model flow. In versions prior to 3.0.8, WriteFileTool and ReadFileTool i…EPSS 13%9.8CVE-2026-52098Flowiseai flowise code injection vulnerabilityAn issue in Flowise 3.1.2 allows a remote attacker to execute arbitrary code via the /api/v1/prediction/<flowId> endpointEPSS 1.1%9.8CVE-2026-41267Flowiseai flowise insecure direct object reference vulnerabilityFlowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, an improper mass assignment (JSON injection)…EPSS 0.48%9.8CVE-2026-41268Flowiseai flowise improper input validation vulnerabilityFlowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, Flowise is vulnerable to a critical unauthen…EPSS 1.2%9.8CVE-2025-58434Flowise forgot-password endpoint leaks reset token, enabling account takeoverFlowise 3.0.5 and earlier returns a valid password reset tempToken and sensitive account details from the forgot-password endpoint without authentica…EPSS 50%analysed

Source: NIST National Vulnerability Database (record CVE-2025-71336), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.