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.
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Flowise versions prior to 3.1.0 are vulnerable to a Server-Side Request Forgery (SSRF) bypass in the Custom Function feature. Authenticated users can utilize built-in Node.js modules to access internal network resources or cloud metadata services, bypassing the application's intended restrictions. Users should upgrade to version 3.1.0 to mitigate this risk.
Severity
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:LCWE-284CWE-918EPSS
Affects
flowiseai:flowiseTechnical 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.