CVE-2026-100607: Flowise through 3.1.4 Authentication Bypass via Email-Only SSO

Severity: high (CVSS 7.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-26 · updated 2026-09-28
Weakness: CWE-287

Description

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.

Affected products

FlowiseAI Flowise: through 3.1.4

References

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-cffm-583c-vffr
https://www.vulncheck.com/advisories/flowise-through-3.1.4-authentication-bypass-via-email-only-sso
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-cffm-583c-vffr

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