Vulnerability Report

CVE-2026-41270

Title: Authenticated SSRF Bypass in Custom Function

SSRF

Proof Of Concept

No public PoC currently indexed for CVE-2026-41270.

CWE Category CWE-284

Published Date Apr 23, 2026

Modified Date Apr 25, 2026

Exploit Status Not Found

Score 7.1 CVSS v3.1

Exploit Probability (EPSS)

0.23%

Vulnerability Summary

CVE-2026-41270: 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.

Impacted Vendors

flowiseai 1

Reference Links

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

CVSS v3.1

Source Entity [email protected]

Severity HIGH

7.1

Attack Vector

NETWORK

Complexity

HIGH

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L