CVE-2026-67620 Flowise 3.1.4 SSRF via fetch-links Endpoint Incomplete Deny-List
Authenticated attackers can exploit SSRF in Flowise to access cloud metadata services, exposing instance identity data and role credentials.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-67620?
CVE-2026-67620 is a medium-severity server-side request forgery vulnerability in Flowiseai Flowise, published on 8 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-918
Which versions are affected by CVE-2026-67620?
It affects 1 product.
Products include Flowiseai Flowise.
How do I fix CVE-2026-67620?
No fix has been published for CVE-2026-67620 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-67620 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-67620 exists.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Flowiseai Flowise
- CVE-2025-71338 Flowise through 2.2.7 - Arbitrary File Write to Remote Code Execution via document-store API
- CVE-2026-40933 Flowise: Authenticated RCE Via MCP Adapters
- CVE-2025-61913 Flowise is vulnerable to arbitrary file read, arbitrary file write
- CVE-2025-59528 Flowise has Remote Code Execution vulnerability
- CVE-2026-52098 Code injection in n/a
Sources
Also known as GHSA-6h53-jfj2-fh9c.