---
id: CVE-2026-67620
title: >-
  Flowise through 3.1.4 contains a server-side request forgery vulnerability in
  the SSRF guard implemented in httpSecurity.ts, where the DEFAULT_DENY_LIST
  omits the Oracle Cloud Infrastructure metadata endpoint 192.0.0.192 and the
  Alibaba …
summary: >-
  Flowise through 3.1.4 contains a server-side request forgery vulnerability in
  the SSRF guard implemented in httpSecurity.ts, where the DEFAULT_DENY_LIST
  omits the Oracle Cloud Infrastructure metadata endpoint 192.0.0.192 and the
  Alibaba …
severity: high
cvss: 7.7
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N'
cwe:
  - CWE-918
published: '2026-08-08'
updated: '2026-08-08'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67620'
references:
  - url: 'https://flowiseai.com/sunset'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/abdugafforov-bobur/CVE-2026-67620-poc'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/flowise-ssrf-via-fetch-links-endpoint-incomplete-deny-list
    label: disclosure@vulncheck.com
tags:
  - nvd
  - exploit-available
ingestedAt: '2026-08-09T05:32:49.735Z'
epss: 0.00463
epssPercentile: 0.37506
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/abdugafforov-bobur/CVE-2026-67620-poc'
  checkedAt: '2026-09-26T09:05:56.265Z'
exploitAvailable: true
---

## Overview

Flowise through 3.1.4 contains a server-side request forgery vulnerability in the SSRF guard implemented in httpSecurity.ts, where the DEFAULT_DENY_LIST omits the Oracle Cloud Infrastructure metadata endpoint 192.0.0.192 and the Alibaba Cloud metadata endpoint 100.100.100.200, allowing authenticated attackers to force the server to issue arbitrary GET requests to cloud instance metadata services. Attackers can send requests to the fetch-links API endpoint with a crafted URL parameter, bypassing deny-list validation including redirect-based bypasses, to reach instance metadata services and expose instance identity data and role credentials on Oracle Cloud Infrastructure or Alibaba Cloud deployments, with unauthenticated access possible when URL-fetching nodes exist in public chatflows.

## Remediation

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