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.
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Fixes

Solution

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Workaround

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History

Fri, 14 Aug 2026 17:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:*

Sat, 08 Aug 2026 03:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 07 Aug 2026 17:30:00 +0000


Fri, 07 Aug 2026 01:15:00 +0000

Type Values Removed Values Added
First Time appeared Flowiseai
Flowiseai flowise
Vendors & Products Flowiseai
Flowiseai flowise

Thu, 06 Aug 2026 22:15:00 +0000

Type Values Removed Values Added
Description 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.
Title Flowise 3.1.4 Authentication Bypass via OAuth2 Credential Refresh Endpoint
Weaknesses CWE-862
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'}

cvssV4_0

{'score': 8.7, 'vector': '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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-14T16:51:36.780Z

Reserved: 2026-08-04T20:17:18.298Z

Link: CVE-2026-70636

cve-icon Vulnrichment

Updated: 2026-08-08T02:46:37.099Z

cve-icon NVD

Status : Received

Published: 2026-08-06T22:18:28.150

Modified: 2026-08-08T03:16:47.187

Link: CVE-2026-70636

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-07T01:00:05Z

Weaknesses