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Flowise CVE-2026-91933

| EUVDEUVD-2026-78791 HIGH
Authorization Bypass Through User-Controlled Key (CWE-639)
2026-09-15 VulnCheck GHSA-g5x4-4x4f-qgq9
Authentication Bypass Flowise Flowiseai
7.6
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
7.6 HIGH
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from Vendor (VulnCheck) · only source for this CVE.

CVSS VectorVendor: VulnCheck

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

6
Analysis Updated
Sep 15, 2026 - 16:32 vuln.today
v2 (cvss_changed)
Re-analysis Queued
Sep 15, 2026 - 16:22 vuln.today
cvss_changed
CVSS changed
Sep 15, 2026 - 16:22 NVD
7.1 (HIGH) 7.6 (HIGH)
Patch available
Sep 15, 2026 - 16:03 EUVD
Analysis Generated
Sep 15, 2026 - 16:00 vuln.today
CVE Published
Sep 15, 2026 - 15:17 cve.org
HIGH 7.1

DescriptionCVE.org

Flowise before 3.1.4 fails to enforce workspace-level authorization checks in openai-realtime endpoints, allowing authenticated users to access tools from ChatFlows in other workspaces by supplying an unscoped chatflowid. Attackers can invoke GET and POST requests to retrieve tool definitions and execute tools from victim workspaces, triggering external side effects and accessing sensitive tool outputs.

AnalysisAI

Broken object-level authorization in Flowise's openai-realtime endpoints lets any authenticated user read tool definitions and execute tools belonging to ChatFlows in other workspaces by supplying an unscoped chatflowid, with both GET and POST requests affected. The flaw is fixed in Flowise 3.1.4 and affects all earlier releases; it is tracked as CWE-639 (authorization bypass through user-controlled key). …

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CVE-2026-91933 vulnerability details – vuln.today
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