Vulnerabilities
Vulnerable Software

Vulnerability Details 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 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.007
EPSS Ranking 49.7%
CVSS Severity
CVSS v3 Score 7.5
Products affected by CVE-2026-70636


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