CVE-2026-91930

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-15. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
7.5
EG Score
7.5(high)
EG Risk
50(Track*)
EG Risk 50/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
31%
KEV
Not listed

Published

September 15, 2026

Last Modified

September 20, 2026

Advisory Details (2)

Auto-updated Sep 15, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Flowise before 3.1.4 Cross-Tenant Organization Admin Takeover | Advisories | VulnCheck

https://www.vulncheck.com/advisories/flowise-before-3.1.4-cross-tenant-organization-admin-takeover
github Patch Available🟡 PoC Available

Cross-tenant organization admin takeover via unscoped organization/workspace membership APIs · Advisory · FlowiseAI/Flowise · GitHub

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-pprx-4prj-35mj

Vendor Advisories for CVE-2026-91930(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 25× in last 7d / 25× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-20 14:04 UTCEG score recompute
  2. 2026-09-20 14:04 UTCGHSA enrichment
  3. 2026-09-20 01:31 UTCEG score recompute
  4. 2026-09-20 01:31 UTCGHSA enrichment
  5. 2026-09-20 01:02 UTCEG score recompute
  6. 2026-09-20 01:02 UTCGHSA enrichment
  7. 2026-09-19 21:46 UTCEG score recompute
  8. 2026-09-19 21:46 UTCGHSA enrichment
  9. 2026-09-19 09:13 UTCGHSA enrichment
  10. 2026-09-18 20:41 UTCEG score recompute
  11. 2026-09-18 20:41 UTCGHSA enrichment
  12. 2026-09-18 19:28 UTCEPSS rescore
  13. 2026-09-18 07:54 UTCEG score recompute
  14. 2026-09-18 07:54 UTCGHSA enrichment
  15. 2026-09-17 19:32 UTCEPSS rescore
  16. 2026-09-17 19:22 UTCGHSA enrichment
  17. 2026-09-17 06:38 UTCGHSA enrichment
  18. 2026-09-16 17:55 UTCEG score recompute
  19. 2026-09-16 17:55 UTCGHSA enrichment
  20. 2026-09-16 14:09 UTCEPSS rescore
  21. 2026-09-16 05:07 UTCEG score recompute
  22. 2026-09-16 05:07 UTCGHSA enrichment
  23. 2026-09-15 16:34 UTCEG score recompute
  24. 2026-09-15 15:24 UTCEG score recompute
  25. 2026-09-15 15:22 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-91930?
CVE-2026-91930 is a high vulnerability published on September 15, 2026. 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…
When was CVE-2026-91930 disclosed?
CVE-2026-91930 was first published in the National Vulnerability Database on September 15, 2026, with the most recent update on September 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-91930 actively exploited?
CVE-2026-91930 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 68.8% of all scored CVEs.
What is the CVSS score of CVE-2026-91930?
CVE-2026-91930 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-91930?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-91930, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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