Privilege escalation in Flowiseai Flowise
CVE-2026-91930
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (34.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 34.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/FlowiseAI/Flowise/security/advisories/GHSA-pprx-4prj-35mj (vendor-advisory)
- www.vulncheck.com/advisories/flowise-before-3.1.4-cross-tenant-organization-adm… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-91930?
- CVE-2026-91930 is a high-severity vulnerability in Flowiseai Flowise, classified under Incorrect Privilege Assignment. CVSS score: 7.5/10. Published 2026-09-15.
- How severe is CVE-2026-91930?
- High severity. CVSS v3 base score is 7.5 out of 10.