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

Vulnerability from cvelistv5 – Published: 2026-08-06 21:31 – Updated: 2026-08-14 16:51 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
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-08 02:46 UTC
CWE
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 7538 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
FlowiseAI Flowise Affected: 0 , ≤ 3.1.4 (semver)
    cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-08-04 00:00
Credits
CayCon, piropatriot
Show details on NVD website
To clipboard 

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