CVE-2026-70636 Flowise 3.1.4 Authentication Bypass via OAuth2 Credential Refresh Endpoint

High 8.7 Published 6 Aug 2026 Updated 14 Aug 2026

Unauthenticated attackers can bypass authentication to trigger unauthorized OAuth token rotation, disrupting integrations in Flowise AI.

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-2026-70636?

CVE-2026-70636 is a high-severity authentication bypass vulnerability in Flowiseai Flowise, published on 6 Aug 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 contains an authentication bypass vulnerability that allows unauthenticated attackers to access the OAuth2 credential refresh endpoint by exploiting prefix-based whitelist matching in the authentication middleware defined in packages/server/src/utils/constants.ts. Attackers can send a POST request to the oauth2-credential refresh route with a trailing credential identifier to bypass all authentication and authorization checks, triggering unauthorized OAuth token rotation against credentials belonging to any workspace and potentially disrupting dependent OAuth integrations. This is a bypass of CVE-2026-41273.

Weakness: CWE-862

Which versions are affected by CVE-2026-70636?

It affects 1 product.

Products include Flowiseai Flowise.

How do I fix CVE-2026-70636?

No fix has been published for CVE-2026-70636 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-2026-70636 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-70636 exists.

All Flowiseai Flowise vulnerabilities

Sources

Also known as GHSA-rm9r-9424-cccf.