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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://flowiseai.com/sunset
- https://github.com/abdugafforov-bobur/CVE-2026-67620-poc
- https://www.vulncheck.com/advisories/flowise-ssrf-via-fetch-links-endpoint-incom
FAQ
What is CVE-2026-67620?
CVE-2026-67620 is a vulnerability with a CVSS score of 7.7 (HIGH). 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 ...
How severe is CVE-2026-67620?
CVE-2026-67620 has been rated HIGH with a CVSS base score of 7.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-67620?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.