CVE-2026-91933 Flowise - Broken Access Control

Flowise < 3.1.4 contains a broken access control caused by missing workspace-level authorization checks in openai-realtime endpoints, letting authenticated users access and execute tools from other workspaces by supplying unscoped chatflowid.

CVSS base score 7.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.35% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Broken Access Control, Information Disclosure, Data Tampering
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L
Published
15 September 2026
Updated
15 October 2026
Weakness
CWE-639

Vendor fix

Upgrade to version 3.1.4 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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