---
id: CVE-2025-59434
title: >-
  Flowise is a drag & drop user interface to build a customized large language
  model flow
summary: >-
  Flowise is a drag & drop user interface to build a customized large language
  model flow. Prior to August 2025 Cloud-Hosted Flowise, an authenticated
  vulnerability in Flowise Cloud allows any user on the free tier to access
  sensitive envi…
severity: critical
cvss: 9.6
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N'
cwe:
  - CWE-200
  - CWE-284
published: '2025-09-22'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T17:10:00.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-59434'
references:
  - url: >-
      https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-435c-mg9p-fv22
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.03398
epssPercentile: 0.88424
ingestedAt: '2026-09-30T17:13:20.711Z'
---

## Overview

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to August 2025 Cloud-Hosted Flowise, an authenticated vulnerability in Flowise Cloud allows any user on the free tier to access sensitive environment variables from other tenants via the Custom JavaScript Function node. This includes secrets such as OpenAI API keys, AWS credentials, Supabase tokens, and Google Cloud secrets — resulting in a full cross-tenant data exposure. This issue has been patched in the August 2025 Cloud-Hosted Flowise.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.