CVE-2026-91930CWE-266

CVE-2026-91930

High · published September 15, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
33.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
7.7 · CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00401 · 33.2th percentile
Weakness
CWE-266 · Incorrect Privilege Assignment
Published
2026-09-15T20:17Z
References (2)
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-pprx-4prj-35mj · [email protected]https://www.vulncheck.com/advisories/flowise-before-3.1.4-cross-tenant-organization-admin-takeover · [email protected]
EPSS history
Timeline
  • 17 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 15 SEP 15:17Z
    Flowise before 3.1.4 Cross-Tenant Organization Admin Takeover
    cvelistv5