High severity · published Sep 15, 2026
CVE-2026-91930
Flowise before 3.1.4 Cross-Tenant Organization Admin Takeover
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
Flowise before 3.1.4 fails to scope enterprise organization and workspace membership APIs to the caller's tenant, allowing authenticated users to supply arbitrary organization IDs. Attackers can add themselves as organization owners, create workspaces, and gain administrative access to victim organizations by exploiting insufficient tenant isolation in the organizationuser and workspace endpoints.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 34% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FL
Flowise · FlowiseAI
before 3.1.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-91930
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-91930
github.com
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-pprx-4prj-35mj
www.vulncheck.com
https://www.vulncheck.com/advisories/flowise-before-3.1.4-cross-tenant-organization-admin-takeover
More from Flowise
10.0
CVE-2026-70478
Flowise: Unauthenticated OAuth2 token refresh endpoint returns access tokens — enables token theft for any connected service
10.0
CVE-2025-59528
Flowise has Remote Code Execution vulnerability
9.9
CVE-2026-73602
Flowise before 3.1.3 Sandbox Escape to RCE
9.9
CVE-2026-67622
Flowise 3.1.4 IDOR in OpenAI Assistants Integration
9.9
CVE-2026-56274
Flowise - Remote Code Execution via MCP Security Bypass in validateCommandFlags and validateArgsForLocalFileAccess