CVE-2026-91929
Received Received - Intake

Cross-Tenant Authorization Bypass in Flowise

Publication date: 2026-09-15

Last updated on: 2026-09-15

Assigner: VulnCheck

Description
Flowise versions before 3.1.4 contain cross-tenant authorization gaps in Enterprise endpoints that fail to verify resource ownership before operations. Attackers with Enterprise access can delete arbitrary workspaces, invite themselves into other organizations, modify cross-org roles, and abuse stored SSO secrets.

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Meta Information

Published
2026-09-15
Last Modified
2026-09-15
Generated
2026-09-15
AI Q&A
2026-09-15
EPSS Evaluated
N/A
NVD
CVE-2026-91929
EUVD
EUVD-2026-78787

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
flowiseai flowise to 3.1.4 (exc)
flowise flowise to 3.1.4 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

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Executive Summary

CVE-2026-91929 is a cross-tenant authorization bypass in Flowise versions before 3.1.4. It allows attackers with Enterprise access to perform unauthorized actions across different organizations or workspaces due to missing resource ownership verification in critical endpoints.

Detection Guidance

To detect this vulnerability, inspect Flowise Enterprise endpoints for missing ownership verification in workspace deletion, account invitations, organization user management, role updates, and SSO configuration testing. Check logs for unauthorized cross-tenant actions or privilege escalations. Review code for endpoints handling these operations to confirm resource ownership checks are absent.

Impact Analysis

This vulnerability enables attackers to delete any workspace and its data, invite themselves into other organizations, modify roles across organizations, and misuse stored SSO secrets. It requires Enterprise access but allows significant damage once exploited.

Compliance Impact

This vulnerability could lead to unauthorized data access, modification, or deletion, violating GDPR's data protection principles and HIPAA's integrity and confidentiality requirements. Organizations using affected versions risk non-compliance and potential regulatory penalties.

Mitigation Strategies

Immediately upgrade Flowise to version 3.1.4 or later. Implement ownership verification checks in Enterprise endpoints before processing sensitive actions. Review and restrict Enterprise license access to trusted users only. Audit logs for suspicious cross-tenant activities and revoke unauthorized access.

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