Vulnerability · Published Apr 23, 2026 · Assigned by GitHub_M

CVE-2026-41273Flowise: Unauthenticated OAuth 2.0 Access Token Disclosure via Public Chatflow

High 7.7

In plain English

A high-severity missing authentication in Flowise from FlowiseAI. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)7.7High

Exploit odds (30 days)0.3%top 76.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	flowise	3.1.0	GHSA-6f7g-v4pp-r667

Affected products (as reported)

Vendor	Product	Versions
FlowiseAI	Flowise	< 3.1.0

Weakness: CWE-306 · 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

References

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