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9.2

Flowise lets attackers log in as any user via email

CVE-2026-100607 · published 14 days ago
Summary

Flowise versions up to 3.1.4 identify users only by their email address and do not keep track of which single sign‑on service or password was used. Because of this, someone who knows a user’s email can sign in through any configured SSO provider or with a local password and gain full access to that account’s data and API keys. Update Flowise to a version that correctly binds users to their original authentication method or apply the vendor’s recommended fix.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
flowiseai flowise <= 3.1.4
Original advisory text
Flowise through 3.1.4 Authentication Bypass via Email-Only SSO
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.
References
Fix within
Internet-facing 14 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker full control
Severity
9.2 Critical
Exploitation
<1% chance of attack within 30 days
Type
CWE-287Improper Authentication
Timeline
Published26 Sep 2026
Updated9 Oct 2026
First seen26 Sep 2026
Sources
CVE-2026-100607 · NVD
CVE-2026-100607 · MITRE
CVE-2026-100607 · OSV
GHSA-cffm-583c-vffr · GHSA
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