CVE-2026-70636
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| FlowiseAI | Flowise | 0 <= 3.1.4 | affected |
Weaknesses
- CWE-862: CWE-862 Missing Authorization
References
- https://github.com/Caycon/cve-advisories/blob/main/2026/Flowise/CVE-2026-70636.md
- https://flowiseai.com/sunset
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