CVE-2026-91930

EUVD-2026-78788
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
7.5 HIGH
NETWORK
HIGH
LOW
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
flowiseaiflowise
𝑥
< 3.1.4
CNA
Common Weakness Enumeration
References
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-pprx-4prj-35mj
https://www.vulncheck.com/advisories/flowise-before-3.1.4-cross-tenant-organization-admin-takeover