What is CVE-2026-91933?

CVE-2026-91933 is a high-severity vulnerability in Flowiseai Flowise, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 7.1/10. Published 2026-09-15.

How severe is CVE-2026-91933?

High severity. CVSS v3 base score is 7.1 out of 10.

Auth bypass in Flowiseai Flowise

CVE-2026-91933

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.

Vulnerability class: IDOR (Insecure Direct Object Reference)

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L.

Affected products

Flowiseai Flowise

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-91933?: CVE-2026-91933 is a high-severity vulnerability in Flowiseai Flowise, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 7.1/10. Published 2026-09-15.
How severe is CVE-2026-91933?: High severity. CVSS v3 base score is 7.1 out of 10.