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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.004 (28.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 28.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/FlowiseAI/Flowise/security/advisories/GHSA-gggp-6qmf-xwwc (vendor-advisory)
- www.vulncheck.com/advisories/flowise-before-3.1.4-authorization-bypass-via-open… (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.