CVE-2026-70636 (GCVE-0-2026-70636)

Vulnerability from cvelistv5 – Published: 2026-08-06 21:31 – Updated: 2026-08-06 21:31 X_Open Source Unsupported When Assigned
VLAI
Title
Flowise 3.1.4 Authentication Bypass via OAuth2 Credential Refresh Endpoint
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.
Severity
8.7 (High)
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
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE
Assigner
References
URL Tags
https://github.com/Caycon/cve-advisories/blob/mai… technical-descriptionexploit
https://flowiseai.com/sunset vendor-advisory
Impacted products
Vendor Product Version
FlowiseAI Flowise Affected: 0 , ≤ 3.1.4 (semver)
Create a notification for this product.
Date Public
2026-08-04 00:00
Credits
CayCon, piropatriot
Show details on NVD website
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}



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