CVE-2026-41270 Flowise: SSRF Protection Bypass via Unprotected Built-in HTTP Modules in Custom Function Sandbox
Authenticated users can bypass SSRF protections in Flowise by using unprotected Node.js modules to access internal network resources.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-41270?
CVE-2026-41270 is a high-severity server-side request forgery vulnerability in Flowiseai Flowise, published on 23 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-41270?
4 open source packages ship an affected version, including flowise and flowise-components. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
flowise npm | All versions | 3.1.0 |
flowise npm | All versions | 3.1.0 |
flowise-components npm | All versions | 3.1.0 |
flowise-components npm | All versions | 3.1.0 |
Products include Flowiseai Flowise.
How do I fix CVE-2026-41270?
Upgrade flowise to 3.1.0 or later.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-41270 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-41270 exists.
Other vulnerabilities in Flowiseai Flowise
- CVE-2025-71338 Flowise through 2.2.7 - Arbitrary File Write to Remote Code Execution via document-store API
- CVE-2026-40933 Flowise: Authenticated RCE Via MCP Adapters
- CVE-2025-61913 Flowise is vulnerable to arbitrary file read, arbitrary file write
- CVE-2025-59528 Flowise has Remote Code Execution vulnerability
- CVE-2026-52098 Code injection in n/a
Sources
Also known as GHSA-xhmj-rg95-44hv.