---
id: "CVE-2026-104331"
kind: "vulnerability"
aliases: ["CVE-2026-104331"]
title: "Langflow: authenticated users can make the server send unauthorized requests"
severity: "medium"
cvss: 5.4
epss: null
exploited: false
status: "open"
category: "ai-tooling"
products: []
ecosystems: []
tags: ["ai-tooling", "langflow", "python", "self-hosted"]
not_affected_if: ["version-outside-range"]
published_at: "2026-10-29T16:17:44+00:00"
first_seen_at: "2026-10-29T16:25:54+00:00"
updated_at: "2026-10-29T16:31:45+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-104331", "first_seen_at": "2026-10-29T16:25:54+00:00"}]
---

# Langflow: authenticated users can make the server send unauthorized requests

IBM Langflow OSS versions 1.0.0 through 1.12.3 have a server-side request forgery flaw. An logged-in attacker can make the server send requests to internal or external addresses, enabling network enumeration or pivoting to other attacks.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Langflow version with `pip show langflow` or the image tag in your deployment
- Confirm whether any version in the range 1.0.0 through 1.12.3 is running

## Fix

- Move Langflow OSS past `1.12.3`; the sources do not name the exact fixed version

## Timeline

- 2026-10-29T16:25:54+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-104331

## From the sources

IBM Langflow OSS 1.0.0 through 1.12.3 is vulnerable to server-side request forgery (SSRF). This may allow an authenticated attacker to send unauthorized requests from the system, potentially leading to network enumeration or facilitating other attacks.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_