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Vulnerabilities CVE-2026-67620

CVE-2026-67620

Medium
Open
TLP:CLEAR

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

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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.

Details

CVSS Score
6.3
EPSS Score
0.43%

35.4th percentile

CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
Confidence
90%
Published
Aug 8, 2026
Last Modified
Aug 10, 2026
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