CVE-2026-41270

Flowise: SSRF Protection Bypass via Unprotected Built-in HTTP Modules in Custom Function Sandbox

State: Published
Severity: 7.1 High
Published: Apr 23, 2026
Updated: Apr 25, 2026
Reserved: Apr 18, 2026

Description

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, a Server-Side Request Forgery (SSRF) protection bypass vulnerability exists in the Custom Function feature. While the application implements SSRF protection via HTTP_DENY_LIST for axios and node-fetch libraries, the built-in Node.js http, https, and net modules are allowed in the NodeVM sandbox without equivalent protection. This allows authenticated users to bypass SSRF controls and access internal network resources (e.g., cloud provider metadata services) This vulnerability is fixed in 3.1.0.

Scores

CVSS	Score	Vector	Source
3.1	7.1 High	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L	GitHub_M

Weaknesses

CWE-284 Improper Access Control
CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Product	Versions
FlowiseFlowiseAI	< 3.1.0Affected
flowise-componentsFlowiseAI	< 3.1.0Affected

References

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-xhmj-rg95-44hv

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