CVE-2026-41273

Flowise: Unauthenticated OAuth 2.0 Access Token Disclosure via Public Chatflow

State: Published
Severity: 7.7 High
Published: Apr 23, 2026
Updated: Apr 24, 2026
Reserved: Apr 18, 2026

Description

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, Flowise contains an authentication bypass vulnerability that allows an unauthenticated attacker to obtain OAuth 2.0 access tokens associated with a public chatflow. By accessing a public chatflow configuration endpoint, an attacker can retrieve internal workflow data, including OAuth credential identifiers, which can then be used to refresh and obtain valid OAuth 2.0 access tokens without authentication. This vulnerability is fixed in 3.1.0.

Scores

CVSS	Score	Vector	Source
4.0	7.7 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:H/SI:N/SA:N	GitHub_M

Weaknesses

CWE-306 Missing Authentication for Critical Function

Affected Products

Product	Versions
FlowiseFlowiseAI	< 3.1.0Affected

References

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6f7g-v4pp-r667

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