CVE-2026-67620
Flowise 3.1.4 SSRF via fetch-links Endpoint Incomplete Deny-List
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.
INFO
Published Date :
Aug. 8, 2026, 4:16 p.m.
Last Modified :
Oct. 24, 2026, 4:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | MITRE-CVE | ||||
| CVSS 4.0 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update Flowise to version 3.1.5 or later.
- Review and update SSRF deny list configurations.
- Remove or restrict fetch-links API usage.
- Audit chatflows for public URL-fetching nodes.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-67620.
| URL | Resource |
|---|---|
| https://flowiseai.com/sunset | Not Applicable |
| https://github.com/abdugafforov-bobur/CVE-2026-67620-poc | Exploit Mitigation Third Party Advisory |
| https://www.vulncheck.com/advisories/flowise-ssrf-via-fetch-links-endpoint-incomplete-deny-list | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-67620 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-67620
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-67620 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-67620 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 24, 2026
Action Type Old Value New Value Changed Translation Title: Flowise de FlowiseAI, Description: Flowise hasta la versión 3.1.4 contiene una vulnerabilidad de falsificación de petición del lado del servidor en el guard SSRF implementado en httpSecurity.ts, donde la DEFAULT_DENY_LIST omite el endpoint de metadatos de Oracle Cloud Infrastructure 192.0.0.192 y el endpoint de metadatos de Alibaba Cloud 100.100.100.200, permitiendo a atacantes autenticados forzar al servidor a emitir peticiones GET arbitrarias a servicios de metadatos de instancias en la nube. Los atacantes pueden enviar peticiones al endpoint de la API fetch-links con un parámetro de URL manipulado, eludiendo la validación de la lista de denegación, incluyendo los bypasses basados en redirecciones, para alcanzar servicios de metadatos de instancias y exponer datos de identidad de instancias y credenciales de rol en despliegues de Oracle Cloud Infrastructure o Alibaba Cloud, siendo posible el acceso no autenticado cuando existen nodos de obtención de URL en chatflows públicos. Title: Flowise de FlowiseAI, Description: Flowise hasta la versión 3.1.4 contiene una vulnerabilidad de falsificación de petición del lado del servidor en el guard SSRF implementado en httpSecurity.ts, donde la DEFAULT_DENY_LIST omite el endpoint de metadatos de Oracle Cloud Infrastructure 192.0.0.192 y el endpoint de metadatos de Alibaba Cloud 100.100.100.200, permitiendo a atacantes autenticados forzar al servidor a emitir peticiones GET arbitrarias a servicios de metadatos de instancias en la nube. Los atacantes pueden enviar peticiones al endpoint de la API fetch-links con un parámetro de URL manipulado, eludiendo la validación de la lista de denegación, incluyendo los bypasses basados en redirecciones, para alcanzar servicios de metadatos de instancias y exponer datos de identidad de instancias y credenciales de rol en despliegues de Oracle Cloud Infrastructure o Alibaba Cloud, siendo posible el acceso no autenticado cuando existen nodos de obtención de URL en chatflows públicos. -
CVE Translated by [email protected]
Oct. 23, 2026
Action Type Old Value New Value Added Translation Title: Flowise de FlowiseAI, Description: Flowise hasta la versión 3.1.4 contiene una vulnerabilidad de falsificación de petición del lado del servidor en el guard SSRF implementado en httpSecurity.ts, donde la DEFAULT_DENY_LIST omite el endpoint de metadatos de Oracle Cloud Infrastructure 192.0.0.192 y el endpoint de metadatos de Alibaba Cloud 100.100.100.200, permitiendo a atacantes autenticados forzar al servidor a emitir peticiones GET arbitrarias a servicios de metadatos de instancias en la nube. Los atacantes pueden enviar peticiones al endpoint de la API fetch-links con un parámetro de URL manipulado, eludiendo la validación de la lista de denegación, incluyendo los bypasses basados en redirecciones, para alcanzar servicios de metadatos de instancias y exponer datos de identidad de instancias y credenciales de rol en despliegues de Oracle Cloud Infrastructure o Alibaba Cloud, siendo posible el acceso no autenticado cuando existen nodos de obtención de URL en chatflows públicos. -
Initial Analysis by [email protected]
Sep. 04, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:* versions up to (including) 3.1.4 Added Reference Type VulnCheck: https://flowiseai.com/sunset Types: Not Applicable Added Reference Type VulnCheck: https://github.com/abdugafforov-bobur/CVE-2026-67620-poc Types: Exploit, Mitigation, Third Party Advisory Added Reference Type VulnCheck: https://www.vulncheck.com/advisories/flowise-ssrf-via-fetch-links-endpoint-incomplete-deny-list Types: Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 10, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-67620', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-10T13:39:26.798218Z'} -
New CVE Received by [email protected]
Aug. 08, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/FlowiseAI/Flowise', 'vendor': 'FlowiseAI', 'product': 'Flowise', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'semver', 'lessThanOrEqual': '3.1.4'}], 'packageURL': 'pkg:github/FlowiseAI/Flowise', 'defaultStatus': 'affected'}] Added Tag unsupported-when-assigned Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N Added CWE CWE-918 Added Reference https://flowiseai.com/sunset Added Reference https://github.com/abdugafforov-bobur/CVE-2026-67620-poc Added Reference https://www.vulncheck.com/advisories/flowise-ssrf-via-fetch-links-endpoint-incomplete-deny-list