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CVE-2026-67620— Flowise 3.1.4 SSRF via fetch-links Endpoint Incomplete Deny-List

Quick assessment

Affected
FlowiseAI Flowise
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FlowiseAI Flowise是FlowiseAI公司开源的一款可视化编排语言模型应用流程的工具。 FlowiseAI Flowise 3.1.4及之前版本存在服务端请求伪造漏洞，该漏洞源于httpSecurity.ts中的SSRF防护的DEFAULT_DENY_LIST未包含Oracle Cloud Infrastructure和Alibaba Cloud元数据端点，可能导致经过身份验证的攻击者通过fetch-links API端点发送特制URL参数绕过拒绝列表（包括基于重定向的绕过），强制服务器向

CVSS 7.7 · High EPSS 0.46% · P38

Affected Version Matrix 1

VendorProduct Version RangeStatus
FlowiseAI Flowise ≤ 3.1.4 affected
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I. Basic Information for CVE-2026-67620

Vulnerability Information
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Vulnerability Title
Flowise 3.1.4 SSRF via fetch-links Endpoint Incomplete Deny-List
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
FlowiseAI Flowise 服务端请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FlowiseAI Flowise是FlowiseAI公司开源的一款可视化编排语言模型应用流程的工具。 FlowiseAI Flowise 3.1.4及之前版本存在服务端请求伪造漏洞，该漏洞源于httpSecurity.ts中的SSRF防护的DEFAULT_DENY_LIST未包含Oracle Cloud Infrastructure和Alibaba Cloud元数据端点，可能导致经过身份验证的攻击者通过fetch-links API端点发送特制URL参数绕过拒绝列表（包括基于重定向的绕过），强制服务器向
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
FlowiseAI Flowise 0 ~ 3.1.4 -

II. Public POCs for CVE-2026-67620

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Reproduction recording is a Pro+ exclusive
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claude_code · 6342 chars
GitHub 复现环境（可 clone 直接跑）
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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POC zip download
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III. Intelligence Information for CVE-2026-67620

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Vendor Advisories for CVE-2026-67620 (1)

Proof of Concept for CVE-2026-67620 (1)

Security Blog Posts for CVE-2026-67620 (1)

IV. Related Vulnerabilities

Same product: Flowise
Same vendor: FlowiseAI
Same weakness: CWE-918

V. Comments for CVE-2026-67620

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