anonhaven

CVE-2026-67620

MEDIUM CVSS 4.0: 6.3 EPSS 0.43%
Updated Aug 10, 2026
Oracle
Parameter Value
CVSS 6.3 (MEDIUM)
Type CWE-918 (Server-Side Request Forgery (SSRF))
Vendor Oracle
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
None
No disruption

CVSS Vector v4.0

Weakness Type (CWE)

CWE-918 Server-Side Request Forgery (SSRF)

Vulnerable Products

flowiseai:flowise

References 3

https://flowiseai.com/sunset
disclosure@vulncheck.com
https://github.com/abdugafforov-bobur/CVE-2026-67620-poc
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/flowise-ssrf-via-fetch-links-endpoint-inco…
disclosure@vulncheck.com
Share Post Share Share Share

Related Vulnerabilities

CVE-2026-74241

Oracle

4.8

CVE-2026-72834

Oracle

5.3

CVE-2026-72853

Oracle

8.8

CVE-2026-73651

Oracle

5.7

CVE-2026-58445

Oracle

2.7