CVE-2026-70636 | BDVDB-2026-356148 Detail

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.

Impact#

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Exploit#

History#

1. Version 12026-08-06Record published in the CVE List.
2. Version 22026-08-14Most recent update recorded in the CVE List.