---
id: CVE-2026-69257
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 3.1.3, Flowise's HTTP security module httpSecurity.ts did
  not normalize IPv4-mapped IPv6 addresses such as ::ffff:127.0.0.1 and
  ::ffff:169.…
severity: high
cvss: 8.6
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N'
cwe:
  - CWE-918
  - CWE-1389
vendor: flowiseai
product: flowise
affected:
  - flowise < 3.1.3
patched:
  - flowise 3.1.3
published: '2026-08-04'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T19:52:01.927'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-69257'
references:
  - url: >-
      https://github.com/FlowiseAI/Flowise/commit/0fc769208395641c1411ccdb9c81416e54802155
    label: security-advisories@github.com
  - url: 'https://github.com/FlowiseAI/Flowise/pull/6431'
    label: security-advisories@github.com
  - url: 'https://github.com/FlowiseAI/Flowise/releases/tag/flowise@3.1.3'
    label: security-advisories@github.com
  - url: >-
      https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-c6xh-wv4j-ppv5
    label: security-advisories@github.com
  - url: >-
      https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-c6xh-wv4j-ppv5
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://github.com/advisories/GHSA-c6xh-wv4j-ppv5'
tags:
  - nvd
  - ghsa
  - npm
epss: 0.00428
epssPercentile: 0.34388
aliases:
  - GHSA-c6xh-wv4j-ppv5
ecosystem: npm
ingestedAt: '2026-08-04T16:40:31.845Z'
---

## Overview

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, Flowise's HTTP security module httpSecurity.ts did not normalize IPv4-mapped IPv6 addresses such as ::ffff:127.0.0.1 and ::ffff:169.254.169.254 before checking them against the deny list. Because ipaddr.js reports these addresses as ipv6 while IPv4 CIDR deny-list entries are ipv4, isDeniedIP() skipped the IPv4 CIDR checks. An attacker who controls DNS resolution for a hostname used by the HTTP Node, API Chain, Document Loader, MCP tool, or other paths using secureAxiosRequest(), secureFetch(), or checkDenyList() could return a AAAA record for an IPv4-mapped target and cause requests to reach localhost, internal services, or cloud metadata endpoints. This issue is fixed in version 3.1.3.

## Affected

- `flowise < 3.1.3`

## Remediation

Upgrade past the affected range:

- `flowise 3.1.3`

## Package advisory (CVE-2026-69257)

Affected packages:

- `flowise <= 3.1.2`

Patched in:

- `flowise 3.1.3`

Source: https://github.com/advisories/GHSA-c6xh-wv4j-ppv5