CVE-2026-67620

HIGH 7.7

Flowise 3.1.4 SSRF via fetch-links Endpoint Incomplete Deny-List

CVSS Score

7.7

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-918
Vendor	flowiseai
Product	flowise
Published	Aug 8, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

FlowiseAI / Flowise

0 ≤ 3.1.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/abdugafforov-bobur/CVE-2026-67620-poc flowiseai.com: https://flowiseai.com/sunset vulncheck.com: https://www.vulncheck.com/advisories/flowise-ssrf-via-fetch-links-endpoint-incomplete-deny-list

Credits

Bobur Abdugafforov (Mahadsec)