CVE-2026-41273CWE-306

Flowise: Unauthenticated OAuth 2.0 Access Token Disclosure via Public Chatflow

High · published April 23, 2026

CVSS v4.0
7.7
EPSS
0%
Percentile
37.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
7.7 · HIGH
Vector
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
EPSS
0.00444 · 37.6th percentile
Weakness
CWE-306 · Missing Authentication for Critical Function
Published
2026-04-23T19:29Z
EPSS history
Timeline
  • 23 APR 19:29Z
    Flowise: Unauthenticated OAuth 2.0 Access Token Disclosure via Public Chatflow
    cvelistv5