CVE-2026-70636 — Flowise 3.1.4 Authentication Bypass via OAuth2 Credential Refresh Endpoint
Flowise through 3.1.4 contains an authentication bypass vulnerability that allows unauthenticated attackers to access the OAuth2 credential refresh endpoint by exploiting prefix…
Published: 2026-08-06 · CVSS: 8.7 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7