CVE-2026-100606 Flowise through 3.1.4 Authentication Bypass via SSO Email Match
Attackers can hijack pending user invitations in Flowise Enterprise by exploiting an SSO logic flaw, gaining unauthorized access to organizations without valid tokens.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-100606?
CVE-2026-100606 is a critical authentication bypass vulnerability in FlowiseAI Flowise, published on 26 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Flowise through 3.1.4 (Enterprise/platform mode with SSO enabled) contains an authentication bypass in the SSO login path. When an SSO callback arrives with an email matching a user whose status is INVITED, verifyAndLogin (SSOBase.ts:80-94) copies the user record from the database — including the server-stored single-use invitation tempToken — into the data passed to AccountService.register(). The register handler's token lookup, email match, and expiry checks therefore pass trivially against the server's own token instead of a caller-supplied one, and the account and its organization membership are flipped to ACTIVE. As a result, anyone able to authenticate at any configured SSO provider using a pending invitee's email address as the email claim can take over that invitation and obtain the invited user's access to the organization without ever possessing the emailed invitation token, for as long as the invitation is valid (24 hours by default). At the time of the advisory no patched version was available.
Weakness: CWE-287
Which versions are affected by CVE-2026-100606?
How do I fix CVE-2026-100606?
No fix has been published for CVE-2026-100606 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-100606 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100606 exists.
Sources
Also known as GHSA-mgrx-3hqw-485h, GHSA-vf3j-89vf-r697.