What is CVE-2026-100607?

CVE-2026-100607 is a high-severity vulnerability in Flowiseai Flowise, classified under Improper Authentication. CVSS score: 7.7/10. Published 2026-09-26.

How severe is CVE-2026-100607?

High severity. CVSS v3 base score is 7.7 out of 10.

Auth bypass in Flowiseai Flowise

CVE-2026-100607

Flowise through 3.1.4 resolves SSO and local-password users solely by email without storing provider or subject identifier bindings, allowing attackers to authenticate as any existing user by claiming their email at any configured SSO provider. Attackers can gain complete account access including chatflows, credentials, and API keys by authenticating through a different SSO provider or local password than the victim's original registration method.

Vulnerability class: Broken Authentication

Published 2026-09-26 · last modified 2026-09-26.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Flowiseai Flowise

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

github.com/FlowiseAI/Flowise/security/advisories/GHSA-cffm-583c-vffr (vendor-advisory)
www.vulncheck.com/advisories/flowise-through-3.1.4-authentication-bypass-via-em… (third-party-advisory)

Frequently asked questions

What is CVE-2026-100607?: CVE-2026-100607 is a high-severity vulnerability in Flowiseai Flowise, classified under Improper Authentication. CVSS score: 7.7/10. Published 2026-09-26.
How severe is CVE-2026-100607?: High severity. CVSS v3 base score is 7.7 out of 10.