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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.

PUBLISHED Reserved 2026-04-18 | Published 2026-04-23 | Updated 2026-04-25 | Assigner GitHub_M




HIGH: 7.1CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L

Problem types

CWE-284: Improper Access Control

CWE-918: Server-Side Request Forgery (SSRF)

Product status

< 3.1.0
affected

< 3.1.0
affected

References

github.com/...lowise/security/advisories/GHSA-xhmj-rg95-44hv exploit

github.com/...lowise/security/advisories/GHSA-xhmj-rg95-44hv

cve.org (CVE-2026-41270)

nvd.nist.gov (CVE-2026-41270)

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