CVE-2026-31829

Received Received - Intake

Server-Side Request Forgery in Flowise HTTP Node Allows Internal Access

Publication date: 2026-03-10

Last updated on: 2026-03-11

Assigner: GitHub, Inc.

Description

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.0.13, Flowise exposes an HTTP Node in AgentFlow and Chatflow that performs server-side HTTP requests using user-controlled URLs. By default, there are no restrictions on target hosts, including private/internal IP ranges (RFC 1918), localhost, or cloud metadata endpoints. This enables Server-Side Request Forgery (SSRF), allowing any user interacting with a publicly exposed chatflow to force the Flowise server to make requests to internal network resources that are inaccessible from the public internet. This vulnerability is fixed in 3.0.13.

CVSS Scores

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Meta Information

Published

2026-03-10

Last Modified

2026-03-11

Generated

2026-07-06

AI Q&A

2026-03-11

EPSS Evaluated

2026-07-05

NVD

CVE-2026-31829

EUVD

EUVD-2026-10930

Affected Vendors & Products

Vendor	Product	Version / Range
flowiseai	flowise	to 3.0.13 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-918	The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

Attack-Flow Graph

Executive Summary

This vulnerability exists in Flowise versions prior to 3.0.13, where an HTTP Node in AgentFlow and Chatflow allows server-side HTTP requests using URLs controlled by users. There are no restrictions on the target hosts, meaning users can make the server send requests to internal or private network addresses, including localhost and cloud metadata endpoints.

This behavior enables a Server-Side Request Forgery (SSRF) attack, where an attacker can trick the Flowise server into accessing internal network resources that are normally inaccessible from the public internet.

Impact Analysis

The vulnerability can allow an attacker to access internal network resources through the Flowise server by exploiting the SSRF flaw. This can lead to unauthorized access to sensitive internal services, data leakage, or further attacks within the internal network.

Because the attacker can reach private IP ranges, localhost, or cloud metadata endpoints, they might retrieve sensitive information or manipulate internal systems that are not exposed to the public internet.

Compliance Impact

I don't know

Detection Guidance

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Mitigation Strategies

To mitigate this vulnerability, you should upgrade Flowise to version 3.0.13 or later, where the issue has been fixed.

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