#VU125533 Incorrect authorization in Flowise - CVE-2026-30820
Published: April 9, 2026
Vulnerability identifier: #VU125533
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-30820
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Flowise
Flowise
Software vendor:
FlowiseAI
FlowiseAI
Description
The vulnerability allows a remote user to bypass authorization checks and escalate privileges.
The vulnerability exists due to incorrect authorization in the /api/v1 route authorization middleware when handling requests with a spoofed x-request-from: internal header. A remote user can send a request with the spoofed header using a valid tenant session cookie to bypass authorization checks and escalate privileges.
The issue affects downstream routers under /api/v1, including internal administration endpoints such as API key management, credential stores, and custom function execution.
Remediation
Install security update from vendor's website.