HIGH 8.7 NVD
CVE-2026-70636
Flowise through 3.1.4 contains an authentication bypass vulnerability that allows unauthenticated attackers to access the OAuth2 credential refresh endpoint by
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.
References
- https://flowiseai.com/sunset
- https://github.com/Caycon/cve-advisories/blob/main/2026/Flowise/CVE-2026-70636.md
This high severity vulnerability with a CVSS score of 8.7 was published on 2026-08-06 via NVD.
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